diff --git a/INSTALL b/INSTALL
index 7430335f..ccb1c4ae 100644
--- a/INSTALL
+++ b/INSTALL
@@ -14,6 +14,7 @@ libtorrent's.
 1) Start with libtorrent:
 
 $ cd libtorrent
+$ ./bootstrap.sh
 $ ./configure --enable-logging --enable-debug --enable-dht
 
 Note1: 64-bit systems may need "--with-boost-libdir=/usr/lib64"
diff --git a/TODO b/TODO
index 2a912581..90a2d733 100644
--- a/TODO
+++ b/TODO
@@ -66,3 +66,8 @@ of his own torrent)
 - Estimate number of online followers by quering the "tracker" resource (implement a value within
 this resource to report the number of torrent peers)
 
+- Define and enforce html directory to serve from. Do installation scripts.
+
+- Don't accept dht "post"+k if k violates the validatePostNumberForUser() rule.
+
+
diff --git a/libtorrent/include/libtorrent/torrent.hpp b/libtorrent/include/libtorrent/torrent.hpp
index 57bb0a83..35390111 100644
--- a/libtorrent/include/libtorrent/torrent.hpp
+++ b/libtorrent/include/libtorrent/torrent.hpp
@@ -523,6 +523,8 @@ namespace libtorrent
 			return m_picker->have_piece(index);
 		}
 
+		void recheck_pieces(uint32_t piece_flags);
+
 		// called when we learn that we have a piece
 		// only once per piece
 		void we_have(int index, boost::uint32_t post_flags);
diff --git a/libtorrent/include/libtorrent/torrent_handle.hpp b/libtorrent/include/libtorrent/torrent_handle.hpp
index 586311a6..29f0ec80 100644
--- a/libtorrent/include/libtorrent/torrent_handle.hpp
+++ b/libtorrent/include/libtorrent/torrent_handle.hpp
@@ -170,6 +170,7 @@ namespace libtorrent
 		void read_piece(int piece) const;
 		void get_pieces(std::vector<std::string> &pieces, int count, int max_id, int since_id, uint32_t filter_flags) const;
 		bool have_piece(int piece) const;
+		void recheck_pieces(uint32_t piece_flags) const;
 
 		void get_full_peer_list(std::vector<peer_list_entry>& v) const;
 		void get_peer_info(std::vector<peer_info>& v) const;
diff --git a/libtorrent/src/kademlia/find_data.cpp b/libtorrent/src/kademlia/find_data.cpp
index 2bcc08d1..1ef1f05b 100644
--- a/libtorrent/src/kademlia/find_data.cpp
+++ b/libtorrent/src/kademlia/find_data.cpp
@@ -206,10 +206,6 @@ bool find_data::invoke(observer_ptr o)
 		return false;
 	}
 
-	// im not going to ask trackers from myself
-	if( o->id() == m_node.nid() )
-		return false;
-
 	entry e;
 	e["z"] = "q";
 	e["q"] = "getData"; // "getPeers"
diff --git a/libtorrent/src/kademlia/node.cpp b/libtorrent/src/kademlia/node.cpp
index 4675c92f..5883dffe 100644
--- a/libtorrent/src/kademlia/node.cpp
+++ b/libtorrent/src/kademlia/node.cpp
@@ -1179,13 +1179,11 @@ void node_impl::incoming_request(msg const& m, entry& e)
 		sha1_hash target = hasher(targetbuf.first,targetbuf.second).final();
 
 //#ifdef TORRENT_DHT_VERBOSE_LOGGING
-		std::string target_str(targetbuf.first,targetbuf.second);
-		printf("PUT target: %s = {%s,%s,%s} = '%s'\n"
-			, to_hex(target.to_string()).c_str()
+		printf("PUT target={%s,%s,%s} from=%s:%d\n"
 			, msg_keys[mk_n]->string_value().c_str()
 			, msg_keys[mk_r]->string_value().c_str()
 			, msg_keys[mk_t]->string_value().c_str()
-			, target_str.c_str());
+			, m.addr.address().to_string().c_str(), m.addr.port());
 //#endif
 
 		// verify the write-token. tokens are only valid to write to
@@ -1359,13 +1357,11 @@ void node_impl::incoming_request(msg const& m, entry& e)
 		if (msg_keys[mk_justtoken] && msg_keys[mk_justtoken]->int_value() != 0) justtoken = true;
 
 //#ifdef TORRENT_DHT_VERBOSE_LOGGING
-		std::string target_str(targetbuf.first,targetbuf.second);
-		printf("GET target: %s = {%s,%s,%s} = '%s'\n"
-			, to_hex(target.to_string()).c_str()
+		printf("GET target={%s,%s,%s} from=%s:%d\n"
 			, msg_keys[mk_n]->string_value().c_str()
 			, msg_keys[mk_r]->string_value().c_str()
 			, msg_keys[mk_t]->string_value().c_str()
-			, target_str.c_str());
+			, m.addr.address().to_string().c_str(), m.addr.port());
 //#endif
 		reply["token"] = generate_token(m.addr, target.to_string().c_str());
 
diff --git a/libtorrent/src/session.cpp b/libtorrent/src/session.cpp
index 8b4d5544..5382ff4a 100644
--- a/libtorrent/src/session.cpp
+++ b/libtorrent/src/session.cpp
@@ -1235,7 +1235,7 @@ namespace libtorrent
 		, coalesce_writes(false)
 		, outgoing_ports(0,0)
 		, peer_tos(0)
-		, active_downloads(3)
+		, active_downloads(6)
 		, active_seeds(5)
 		, active_dht_limit(88) // don't announce more than once every 40 seconds
 		, active_tracker_limit(1600) // don't announce to trackers more than once every 1.125 seconds
diff --git a/libtorrent/src/torrent.cpp b/libtorrent/src/torrent.cpp
index dde7b2aa..71597a6c 100644
--- a/libtorrent/src/torrent.cpp
+++ b/libtorrent/src/torrent.cpp
@@ -2057,25 +2057,26 @@ namespace libtorrent
 	{
 		TORRENT_ASSERT(m_ses.is_network_thread());
 		if (!m_ses.m_dht) return;
-        if (!m_name) return;
+		if (!m_name) return;
 		if (!should_announce_dht()) return;
 
 		TORRENT_ASSERT(m_allow_peers);
 
-		// [MF] use m_dht->announce with myself=false to update dht tracker with other peers
+		// [MF] use m_dht->announce with myself=false to update dht tracker with peers we know
 		{
-		    policy::const_iterator i = get_policy().begin_peer();
-		    policy::const_iterator end = get_policy().end_peer();
-		    for (; i != end; ++i)
-		    {
-			policy::peer const* p = *i;
+			policy::const_iterator i = get_policy().begin_peer();
+			policy::const_iterator end = get_policy().end_peer();
+			for (; i != end; ++i) {
+				policy::peer const* p = *i;
 
-			if( p->connectable && !p->banned ) {
+				bool connect_recently = !p->banned && int(p->failcount) < settings().max_failcount &&
+						p->last_connected && (m_ses.session_time() - p->last_connected) < (4*3600);
+				if( p->connectable && ( p->connection || connect_recently) ) {
 						m_ses.m_dht->announce(name(), m_torrent_file->info_hash()
 						  , p->address(), p->port, p->seed, false
 						  , boost::bind(&nop));
+				}
 			}
-		    }
 		}
 
 #ifdef TORRENT_USE_OPENSSL
@@ -3072,6 +3073,30 @@ namespace libtorrent
 			m_picker->set_piece_priority(i, 6);
 	}
 
+	void on_disk_read_recheck_piece_complete(int ret, disk_io_job const& j, peer_request r)
+	{
+		// [MF] FIXME: implement cond_wakeup here so that recheck_pieces would wait
+	}
+
+	void torrent::recheck_pieces(uint32_t piece_flags)
+	{
+		TORRENT_ASSERT(m_ses.is_network_thread());
+		TORRENT_ASSERT(m_picker);
+
+		for( int i = 0; i <= last_have(); i++) {
+			if( m_picker->have_piece(i) && m_picker->post_flags(i) == piece_flags ) {
+				peer_request r;
+				r.piece = i;
+				r.start = 0;
+				r.length = torrent_file().piece_size(i);
+
+				filesystem().async_read_and_hash(r,
+				    boost::bind(&on_disk_read_recheck_piece_complete
+						, _1, _2, r), 1);
+			}
+		}
+	}
+
 	void torrent::we_have(int index, boost::uint32_t post_flags)
 	{
 		TORRENT_ASSERT(m_ses.is_network_thread());
diff --git a/libtorrent/src/torrent_handle.cpp b/libtorrent/src/torrent_handle.cpp
index ab216e93..590bd4e6 100644
--- a/libtorrent/src/torrent_handle.cpp
+++ b/libtorrent/src/torrent_handle.cpp
@@ -846,6 +846,12 @@ namespace libtorrent
 		return r;
 	}
 
+	void torrent_handle::recheck_pieces(uint32_t piece_flags) const
+	{
+		INVARIANT_CHECK;
+		TORRENT_SYNC_CALL1(recheck_pieces, piece_flags);
+	}
+
 	storage_interface* torrent_handle::get_storage_impl() const
 	{
 		INVARIANT_CHECK;
diff --git a/src/bitcoind.cpp b/src/bitcoind.cpp
index f9715a88..905e980a 100644
--- a/src/bitcoind.cpp
+++ b/src/bitcoind.cpp
@@ -124,64 +124,6 @@ bool AppInit(int argc, char* argv[])
 }
 
 
-static const string strSecret1C    ("Kwr371tjA9u2rFSMZjTNun2PXXP3WPZu2afRHTcta6KxEUdm1vEw");
-
-static bool TestCreateSpamMsgTx()
-{
-    CTransaction txNew;
-
-    txNew.message = CScript() << strSpamMessage;
-
-    CBitcoinSecret bsecret1;
-    bsecret1.SetString (strSecret1C);
-
-    CKey key;
-    key.MakeNewKey(true);
-    //CKey key =  bsecret1.GetKey();
-    CPubKey pubkey( key.GetPubKey() );
-
-    printf("key valid: %d compressed: %d\n", key.IsValid(), key.IsCompressed());
-    printf("pubkey: %s\n", EncodeBase64(&pubkey[0], pubkey.size()).c_str() );
-
-    // compute message hash and sign it
-    CHashWriter ss(SER_GETHASH, PROTOCOL_VERSION);
-    ss << txNew.message;
-    uint256 hashMsg = ss.GetHash();
-
-    // vchSig is sig(hash(message))
-    vector<unsigned char> vchSig;
-    if (!key.Sign(hashMsg, vchSig)) {
-        printf("CreateNewBlock: Failed to sign SpamMessage\n");
-        return false;
-    }
-
-    /*
-    vector<unsigned char> vchSigCompact;
-    if (!key.SignCompact(hashMsg, vchSigCompact)) {
-        printf("CreateNewBlock: Failed to sign SpamMessage2\n");
-        return false;
-    }
-    printf("sign size: %zu signCompact size: %zu\n", vchSig.size(), vchSigCompact.size());
-    printf("signCompact: %s\n", EncodeBase64(&vchSigCompact[0], vchSigCompact.size()).c_str());
-    */
-
-    printf("CreateSpamMsgTx: msg = %s user = %s hash = %s signedhash = %s\n", txNew.message.ToString().c_str(), strSpamUser.c_str(),
-           hashMsg.ToString().c_str(), EncodeBase64(&vchSig[0], vchSig.size()).c_str() );
-
-    // add username and signature
-    txNew.userName = CScript() << strSpamUser;
-    txNew.userName += CScript() << vchSig;
-    txNew.pubKey.clear(); // pubKey will be updated to include extranonce
-    txNew.nNonce = 0; // no update needed for spamMessage's nonce.
-
-    std::vector< std::vector<unsigned char> > vData;
-    txNew.userName.ExtractPushData(vData);
-
-    printf("Verify: %d\n", pubkey.Verify(hashMsg,vData[1]));
-
-    exit(1);
-}
-
 extern void GenesisMiner();
 extern void noui_connect();
 int main(int argc, char* argv[])
@@ -190,7 +132,6 @@ int main(int argc, char* argv[])
     fHaveGUI = false;
 
     //GenesisMiner();
-    //TestCreateSpamMsgTx();
 
     // Connect bitcoind signal handlers
     noui_connect();
diff --git a/src/bitcoinrpc.cpp b/src/bitcoinrpc.cpp
index 13fd68a1..285ddbc3 100644
--- a/src/bitcoinrpc.cpp
+++ b/src/bitcoinrpc.cpp
@@ -230,6 +230,7 @@ static const CRPCCommand vRPCCommands[] =
     { "submitblock",            &submitblock,            false,     false },
     { "listsinceblock",         &listsinceblock,         false,     false },
     { "dumpprivkey",            &dumpprivkey,            true,      false },
+    { "dumppubkey",             &dumppubkey,             false,     false },
     { "dumpwallet",             &dumpwallet,             true,      false },
     { "importprivkey",          &importprivkey,          false,     false },
     { "importwallet",           &importwallet,           false,     false },
@@ -254,8 +255,7 @@ static const CRPCCommand vRPCCommands[] =
     { "getfollowing",           &getfollowing,           false,     true },
     { "getlasthave",            &getlasthave,            false,     true },
     { "listusernamespartial",   &listusernamespartial,   false,     true },
-    { "getdefaultuser",         &getdefaultuser,         false,     true },
-    { "setdefaultuser",         &setdefaultuser,         false,     true },
+    { "rescandirectmsgs",       &rescandirectmsgs,       false,     true },
 };
 
 CRPCTable::CRPCTable()
@@ -917,7 +917,8 @@ void JSONRequest::parse(const Value& valRequest)
         throw JSONRPCError(RPC_INVALID_REQUEST, "Method must be a string");
     strMethod = valMethod.get_str();
     if (strMethod != "getwork" && strMethod != "getblocktemplate" &&
-        strMethod != "getlasthave")
+        strMethod != "getlasthave" &&
+        strMethod != "getinfo" && strMethod != "getbestblockhash" && strMethod != "getblock")
         printf("ThreadRPCServer method=%s\n", strMethod.c_str());
 
     // Parse params
@@ -1244,6 +1245,7 @@ Array RPCConvertValues(const std::string &strMethod, const std::vector<std::stri
     if (strMethod == "lockunspent"            && n > 0) ConvertTo<bool>(params[0]);
     if (strMethod == "lockunspent"            && n > 1) ConvertTo<Array>(params[1]);
     if (strMethod == "importprivkey"          && n > 2) ConvertTo<bool>(params[2]);
+    if (strMethod == "importprivkey"          && n > 3) ConvertTo<bool>(params[3]);
     if (strMethod == "verifychain"            && n > 0) ConvertTo<boost::int64_t>(params[0]);
     if (strMethod == "verifychain"            && n > 1) ConvertTo<boost::int64_t>(params[1]);
     if (strMethod == "dhtput"                 && n > 3) ConvertToValue(params[3]);
@@ -1261,6 +1263,7 @@ Array RPCConvertValues(const std::string &strMethod, const std::vector<std::stri
     if (strMethod == "follow"                 && n > 1) ConvertTo<Array>(params[1]);
     if (strMethod == "unfollow"               && n > 1) ConvertTo<Array>(params[1]);
     if (strMethod == "listusernamespartial"   && n > 1) ConvertTo<boost::int64_t>(params[1]);
+    if (strMethod == "listusernamespartial"   && n > 2) ConvertTo<bool>(params[2]);
 
     return params;
 }
diff --git a/src/bitcoinrpc.h b/src/bitcoinrpc.h
index 2b080685..28266de7 100644
--- a/src/bitcoinrpc.h
+++ b/src/bitcoinrpc.h
@@ -146,6 +146,7 @@ extern json_spirit::Value addnode(const json_spirit::Array& params, bool fHelp);
 extern json_spirit::Value getaddednodeinfo(const json_spirit::Array& params, bool fHelp);
 
 extern json_spirit::Value dumpprivkey(const json_spirit::Array& params, bool fHelp); // in rpcdump.cpp
+extern json_spirit::Value dumppubkey(const json_spirit::Array& params, bool fHelp); // in rpcdump.cpp
 extern json_spirit::Value importprivkey(const json_spirit::Array& params, bool fHelp);
 extern json_spirit::Value dumpwallet(const json_spirit::Array& params, bool fHelp);
 extern json_spirit::Value importwallet(const json_spirit::Array& params, bool fHelp);
@@ -206,7 +207,6 @@ extern json_spirit::Value unfollow(const json_spirit::Array& params, bool fHelp)
 extern json_spirit::Value getfollowing(const json_spirit::Array& params, bool fHelp);
 extern json_spirit::Value getlasthave(const json_spirit::Array& params, bool fHelp);
 extern json_spirit::Value listusernamespartial(const json_spirit::Array& params, bool fHelp);
-extern json_spirit::Value getdefaultuser(const json_spirit::Array& params, bool fHelp);
-extern json_spirit::Value setdefaultuser(const json_spirit::Array& params, bool fHelp);
+extern json_spirit::Value rescandirectmsgs(const json_spirit::Array& params, bool fHelp);
 
 #endif
diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index 4add2bdc..0a03e37d 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -33,7 +33,7 @@ public:
         nDefaultPort = 28333;
         nRPCPort = 28332;
         bnProofOfWorkLimit = CBigNum(~uint256(0) >> 1);
-        nTxBits = 0x1e03ffff;
+        nTxBits = 0x1e00ffff;
         nSubsidyHalvingInterval = 210000;
 
         // Build the genesis block. Note that the output of the genesis coinbase cannot
diff --git a/src/init.cpp b/src/init.cpp
index dccbda3b..6307a288 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -177,7 +177,7 @@ std::string HelpMessage()
     strUsage += "  -socks=<n>             " + _("Select the version of socks proxy to use (4-5, default: 5)") + "\n";
     strUsage += "  -tor=<ip:port>         " + _("Use proxy to reach tor hidden services (default: same as -proxy)") + "\n";
     strUsage += "  -dns                   " + _("Allow DNS lookups for -addnode, -seednode and -connect") + "\n";
-    strUsage += "  -port=<port>           " + _("Listen for connections on <port> (default: 8333 or testnet: 18333)") + "\n";
+    strUsage += "  -port=<port>           " + _("Listen for connections on <port> (default: 28333 or testnet: 18333)") + "\n";
     strUsage += "  -maxconnections=<n>    " + _("Maintain at most <n> connections to peers (default: 125)") + "\n";
     strUsage += "  -addnode=<ip>          " + _("Add a node to connect to and attempt to keep the connection open") + "\n";
     strUsage += "  -connect=<ip>          " + _("Connect only to the specified node(s)") + "\n";
@@ -220,7 +220,7 @@ std::string HelpMessage()
 #endif
     strUsage += "  -rpcuser=<user>        " + _("Username for JSON-RPC connections") + "\n";
     strUsage += "  -rpcpassword=<pw>      " + _("Password for JSON-RPC connections") + "\n";
-    strUsage += "  -rpcport=<port>        " + _("Listen for JSON-RPC connections on <port> (default: 8332 or testnet: 18332)") + "\n";
+    strUsage += "  -rpcport=<port>        " + _("Listen for JSON-RPC connections on <port> (default: 28332 or testnet: 18332)") + "\n";
     strUsage += "  -rpcallowip=<ip>       " + _("Allow JSON-RPC connections from specified IP address") + "\n";
     if (!fHaveGUI)
         strUsage += "  -rpcconnect=<ip>       " + _("Send commands to node running on <ip> (default: 127.0.0.1)") + "\n";
diff --git a/src/main.cpp b/src/main.cpp
index 965353eb..34993fe2 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -425,10 +425,45 @@ bool CheckTransaction(const CTransaction& tx, CValidationState &state)
 {
     // Basic checks that don't depend on any context
     if (tx.IsSpamMessage()) {
-      if (tx.message.size() > MAX_SPAM_MSG_SIZE)
-          return state.DoS(100, error("CheckTransaction() : spam message too big"));
-      // [MF] TODO: check message signature
-      // [MF] Problem: registration of this user may be in the block itself, better check later.
+        string spamMsg = tx.message.ExtractPushDataString(0);
+        if (!spamMsg.size())
+            return state.DoS(100, error("CheckTransaction() : invalid or empty spam message"));
+        if (spamMsg.size() > MAX_SPAM_MSG_SIZE)
+            return state.DoS(100, error("CheckTransaction() : spam message too big"));
+
+        string spamUser = tx.userName.ExtractPushDataString(0);
+        if( spamUser != "nobody" ) {
+            string strSign = tx.userName.ExtractPushDataString(1);
+            if (!strSign.size())
+                return state.DoS(100, error("CheckTransaction() : spam signature missing"));
+            vector<unsigned char> vchSig((const unsigned char*)strSign.data(),
+                                         (const unsigned char*)strSign.data() + strSign.size());
+
+            CPubKey pubkey;
+            CTransaction txPubKey;
+            uint256 hashBlock;
+            uint256 userhash = SerializeHash(spamUser);
+            if( !GetTransaction(userhash, txPubKey, hashBlock) )
+                return state.DoS(100, error("CheckTransaction() : spam signed by unknown user"));
+
+            std::vector< std::vector<unsigned char> > vData;
+            if( !txPubKey.pubKey.ExtractPushData(vData) || vData.size() < 1 )
+                return state.DoS(100, error("CheckTransaction() : spam signed with broken pubkey"));
+
+            pubkey = CPubKey(vData[0]);
+
+            // compute message hash for signature checking
+            CHashWriter ss(SER_GETHASH, PROTOCOL_VERSION);
+            ss << strMessageMagic;
+            ss << tx.message;
+
+            CPubKey pubkeyRec;
+            if (!pubkeyRec.RecoverCompact(ss.GetHash(), vchSig))
+                return state.DoS(100, error("CheckTransaction() : RecoverCompact failed for spammsg"));
+
+            if (pubkeyRec.GetID() != pubkey.GetID())
+                return state.DoS(100, error("CheckTransaction() : spam signature verification failed"));
+        }
     } else {
       if (tx.userName.empty())
           return state.DoS(10, error("CheckTransaction() : username empty"));
@@ -1713,11 +1748,10 @@ bool ProcessBlock(CValidationState &state, CNode* pfrom, CBlock* pblock, CDiskBl
     if( pblock->vtx[0].IsSpamMessage() ) {
         string msg = pblock->vtx[0].message.ExtractPushDataString(0);
         string user = pblock->vtx[0].userName.ExtractPushDataString(0);
-        // [MF] FIXME: validate user properly
-        if( msg.length() <= 140 ) {
-            printf("ProcessBlock: msg='%s' user='%s'\n", msg.c_str(), user.c_str());
-            receivedSpamMessage(msg, user);
-        }
+
+        // SpamMessage was already validated in CheckBlock => CheckTransation
+        printf("ProcessBlock: msg='%s' user='%s'\n", msg.c_str(), user.c_str());
+        receivedSpamMessage(msg, user);
     }
     return true;
 }
@@ -3492,10 +3526,12 @@ static bool CreateSpamMsgTx(CTransaction &txNew, std::vector<unsigned char> &sal
     std::string strUsername = strSpamUser;
 
     CKeyID keyID;
-    if( !pwalletMain->GetKeyIdFromUsername(strSpamUser, keyID) ) {
+    if( strSpamUser != "nobody" && !pwalletMain->GetKeyIdFromUsername(strSpamUser, keyID) ) {
       if( pwalletMain->vchDefaultKey.IsValid() ) {
         keyID = pwalletMain->vchDefaultKey.GetID();
         strUsername = pwalletMain->mapKeyMetadata[keyID].username;
+      } else {
+        strUsername = "nobody";
       }
     }
     printf("CreateSpamMsgTx: keyId = %s\n", keyID.ToString().c_str() );
@@ -3534,6 +3570,10 @@ static bool CreateSpamMsgTx(CTransaction &txNew, std::vector<unsigned char> &sal
     txNew.pubKey.clear(); // pubKey will be updated to include extranonce
     txNew.nNonce = 0; // no update needed for spamMessage's nonce.
 
+    CValidationState state;
+    bool ret = CheckTransaction(txNew, state);
+    printf("CheckTransaction returned %d\n", ret );
+
     return true;
 }
 
diff --git a/src/netbase.cpp b/src/netbase.cpp
index 4a34e194..c1c089b0 100644
--- a/src/netbase.cpp
+++ b/src/netbase.cpp
@@ -382,7 +382,7 @@ bool static ConnectSocketDirectly(const CService &addrConnect, SOCKET& hSocketRe
             }
             if (nRet != 0)
             {
-                printf("connect() failed after select(): %s\n",strerror(nRet));
+                //printf("connect() failed after select(): %s\n",strerror(nRet));
                 closesocket(hSocket);
                 return false;
             }
diff --git a/src/rpcdump.cpp b/src/rpcdump.cpp
index 6c139d6d..9116dc29 100644
--- a/src/rpcdump.cpp
+++ b/src/rpcdump.cpp
@@ -9,6 +9,7 @@
 #include "bitcoinrpc.h"
 #include "ui_interface.h"
 #include "base58.h"
+#include "twister.h"
 
 #include <boost/date_time/posix_time/posix_time.hpp>
 #include <boost/lexical_cast.hpp>
@@ -67,9 +68,9 @@ std::string DecodeDumpString(const std::string &str) {
 
 Value importprivkey(const Array& params, bool fHelp)
 {
-    if (fHelp || params.size() < 2 || params.size() > 3)
+    if (fHelp || params.size() < 2 || params.size() > 4)
         throw runtime_error(
-            "importprivkey <bitcoinprivkey> <username> [rescan=true]\n"
+            "importprivkey <bitcoinprivkey> <username> [rescan=true] [allow_new_user=false]\n"
             "Adds a private key (as returned by dumpprivkey) to your wallet.");
 
     string strSecret = params[0].get_str();
@@ -80,11 +81,24 @@ Value importprivkey(const Array& params, bool fHelp)
     if (params.size() > 2)
         fRescan = params[2].get_bool();
 
+    bool fAllowNewUser = false;
+    if (params.size() > 3)
+        fAllowNewUser = params[3].get_bool();
+
     CBitcoinSecret vchSecret;
     bool fGood = vchSecret.SetString(strSecret);
 
     if (!fGood) throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid private key");
 
+    if( !fAllowNewUser ) {
+        CTransaction txOut;
+        uint256 hashBlock;
+        uint256 userhash = SerializeHash(strUsername);
+        if( !GetTransaction(userhash, txOut, hashBlock) ) {
+            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "User must exist (or allow_new_user flag must be set)");
+        }
+    }
+
     CKey key = vchSecret.GetKey();
     CPubKey pubkey = key.GetPubKey();
     CKeyID vchAddress = pubkey.GetID();
@@ -211,6 +225,26 @@ Value dumpprivkey(const Array& params, bool fHelp)
     return CBitcoinSecret(vchSecret).ToString();
 }
 
+Value dumppubkey(const Array& params, bool fHelp)
+{
+    if (fHelp || params.size() != 1)
+        throw runtime_error(
+            "dumppubkey <username>\n"
+            "Returns the public key corresponding to <username> (empty if user doesn't exist)");
+
+    string strUsername = params[0].get_str();
+
+    CPubKey pubkey;
+    bool gotKey = getUserPubKey(strUsername, pubkey);
+
+    if( !gotKey ) {
+        return "";
+    }
+
+    string strPubkey = string( reinterpret_cast<const char *>(pubkey.begin()), pubkey.size());
+    return strPubkey;
+}
+
 
 Value dumpwallet(const Array& params, bool fHelp)
 {
diff --git a/src/rpcwallet.cpp b/src/rpcwallet.cpp
index 7cde6dab..c611ba02 100644
--- a/src/rpcwallet.cpp
+++ b/src/rpcwallet.cpp
@@ -153,6 +153,10 @@ Value listwalletusers(const Array& params, bool fHelp)
     return ret;
 }
 
+/* [mf] no use for setting/getting defaultuser, it just adds confusion.
+   all commands should receive user as parameter (including the user for spammsg).
+*/
+#if 0
 Value setdefaultuser(const Array& params, bool fHelp)
 {
     if (fHelp || params.size() != 1)
@@ -199,7 +203,7 @@ Value getdefaultuser(const Array& params, bool fHelp)
 
     return username;
 }
-
+#endif
 
 Value signmessage(const Array& params, bool fHelp)
 {
diff --git a/src/twister.cpp b/src/twister.cpp
index e7742069..9f427524 100644
--- a/src/twister.cpp
+++ b/src/twister.cpp
@@ -69,8 +69,10 @@ sha1_hash dhtTargetHash(std::string const &username, std::string const &resource
 
 torrent_handle startTorrentUser(std::string const &username)
 {
+    bool userInTxDb = usernameExists(username); // keep this outside cs_twister to avoid deadlock
+
     LOCK(cs_twister);
-    if( !m_userTorrent.count(username) ) {
+    if( !m_userTorrent.count(username) && userInTxDb ) {
         sha1_hash ih = dhtTargetHash(username, "tracker", "m");
 
         printf("adding torrent for [%s,tracker]\n", username.c_str());
@@ -111,6 +113,12 @@ int saveGlobalData(std::string const& filename)
     globalDict["receivedSpamMsg"]   = m_receivedSpamMsgStr;
     globalDict["receivedSpamUser"]  = m_receivedSpamUserStr;
     globalDict["lastSpamTime"]      = m_lastSpamTime;
+    globalDict["sendSpamMsg"]       = strSpamMessage;
+    globalDict["sendSpamUser"]      = strSpamUser;
+    globalDict["generate"]          = GetBoolArg("-gen", false);
+    int genproclimit = GetArg("-genproclimit", -1);
+    if( genproclimit > 0 )
+        globalDict["genproclimit"]  = genproclimit;
 
     std::vector<char> buf;
     bencode(std::back_inserter(buf), globalDict);
@@ -131,6 +139,20 @@ int loadGlobalData(std::string const& filename)
             m_receivedSpamMsgStr  = userDict.dict_find_string_value("receivedSpamMsg");
             m_receivedSpamUserStr = userDict.dict_find_string_value("receivedSpamUser");
             m_lastSpamTime        = userDict.dict_find_int_value("lastSpamTime");
+            string sendSpamMsg    = userDict.dict_find_string_value("sendSpamMsg");
+            if( sendSpamMsg.size() ) strSpamMessage = sendSpamMsg;
+            string sendSpamUser   = userDict.dict_find_string_value("sendSpamUser");
+            if( sendSpamUser.size() ) strSpamUser = sendSpamUser;
+            bool generate         = userDict.dict_find_int_value("generate");
+            int genproclimit      = userDict.dict_find_int_value("genproclimit");
+
+            if( generate ) {
+                Array params;
+                params.push_back( generate );
+                if( genproclimit > 0 )
+                    params.push_back( genproclimit );
+                setgenerate(params, false);
+            }
 
             return 0;
         }
@@ -249,14 +271,16 @@ void ThreadMaintainDHTNodes()
     while(1) {
         MilliSleep(5000);
 
+        session_status ss = ses->status();
+        int dht_nodes = ss.dht_nodes;
         bool nodesAdded = false;
+
         if( ses ) {
             LOCK(cs_vNodes);
             vector<CAddress> vAddr = addrman.GetAddr();
-            session_status ss = ses->status();
             int totalNodesCandidates = (int)(vNodes.size() + vAddr.size());
-            if( (!ss.dht_nodes && totalNodesCandidates) ||
-                ss.dht_nodes < totalNodesCandidates / 2 ) {
+            if( (!dht_nodes && totalNodesCandidates) ||
+                (dht_nodes < 5 && totalNodesCandidates > 10) ) {
                 printf("ThreadMaintainDHTNodes: too few dht_nodes, trying to add some...\n");
                 BOOST_FOREACH(const CAddress &a, vAddr) {
                     std::string addr = a.ToStringIP();
@@ -269,7 +293,7 @@ void ThreadMaintainDHTNodes()
                     // if !fInbound we created this connection so ip is reachable.
                     // we can't use port number of inbound connection, so try standard port.
                     // only use inbound as last resort (if dht_nodes empty)
-                    if( !pnode->fInbound || !ss.dht_nodes ) {
+                    if( !pnode->fInbound || !dht_nodes ) {
                         std::string addr = pnode->addr.ToStringIP();
                         int port = (!pnode->fInbound) ? pnode->addr.GetPort() : Params().GetDefaultPort();
                         port += LIBTORRENT_PORT_OFFSET;
@@ -283,9 +307,18 @@ void ThreadMaintainDHTNodes()
             }
         }
         if( nodesAdded ) {
-            LOCK(cs_twister);
-            BOOST_FOREACH(const PAIRTYPE(std::string, torrent_handle)& item, m_userTorrent) {
-                item.second.force_dht_announce();
+            MilliSleep(5000);
+            ss = ses->status();
+            if( ss.dht_nodes > dht_nodes ) {
+                // new nodes were added to dht: force updating peers from dht so torrents may start faster
+                LOCK(cs_twister);
+                BOOST_FOREACH(const PAIRTYPE(std::string, torrent_handle)& item, m_userTorrent) {
+                    item.second.force_dht_announce();
+                }
+            } else {
+                // nodes added but dht ignored them, so they are probably duplicated.
+                // we sleep a bit as a punishment :-)
+                MilliSleep(30000);
             }
         }
     }
@@ -489,7 +522,6 @@ void stopSessionTorrent()
                 // save_resume_data will generate an alert when it's done
                 st.handle.save_resume_data();
                 ++num_outstanding_resume_data;
-                printf("\r%d  ", num_outstanding_resume_data);
             }
             printf("\nwaiting for resume data [%d]\n", num_outstanding_resume_data);
             while (num_outstanding_resume_data > 0)
@@ -658,12 +690,16 @@ bool processReceivedDM(lazy_entry const* post)
                     LOCK(cs_twister);
                     // store this dm in memory list, but prevent duplicates
                     std::vector<StoredDirectMsg> &dmsFromToUser = m_users[item.second.username].m_directmsg[n];
-                    std::vector<StoredDirectMsg>::const_iterator it;
+                    std::vector<StoredDirectMsg>::iterator it;
                     for( it = dmsFromToUser.begin(); it != dmsFromToUser.end(); ++it ) {
                         if( stoDM.m_utcTime == (*it).m_utcTime &&
                             stoDM.m_text    == (*it).m_text ) {
                             break;
                         }
+                        if( stoDM.m_utcTime < (*it).m_utcTime ) {
+                            dmsFromToUser.insert(it, stoDM);
+                            break;
+                        }
                     }
                     if( it == dmsFromToUser.end() ) {
                         dmsFromToUser.push_back(stoDM);
@@ -947,7 +983,8 @@ bool shouldDhtResourceExpire(std::string resource, bool multi, int height)
             if( m_noExpireResources[resourceBasic] == PostNoExpireRecent &&
                 (height + BLOCK_AGE_TO_EXPIRE_DHT_POSTS) < getBestHeight() ) {
 #ifdef DEBUG_EXPIRE_DHT_ITEM
-                printf("shouldDhtResourceExpire: expiring old post resource '%s'\n", resource.c_str());
+                printf("shouldDhtResourceExpire: expiring old post resource '%s' (height %d cur %d)\n",
+                       resource.c_str(), height, getBestHeight());
 #endif
                 return true;
             }
@@ -1262,6 +1299,8 @@ Value newrtmsg(const Array& params, bool fHelp)
     // post to dht as well
     ses->dht_putData(strUsername, string("post")+strK, false,
                      v, strUsername, GetAdjustedTime(), 1);
+    ses->dht_putData(strUsername, string("status"), false,
+                     v, strUsername, GetAdjustedTime(), k);
 
     // notification to keep track of RTs of the original post
     if( rt ) {
@@ -1532,13 +1571,16 @@ Value getlasthave(const Array& params, bool fHelp)
 
 Value listusernamespartial(const Array& params, bool fHelp)
 {
-    if (fHelp || (params.size() != 2))
+    if (fHelp || (params.size() < 2 || params.size() > 3))
         throw runtime_error(
-            "listusernamespartial <username_starts_with> <count>\n"
+            "listusernamespartial <username_starts_with> <count> [exact_match=false]\n"
             "get list of usernames starting with");
 
     string userStartsWith = params[0].get_str();
     size_t count          = params[1].get_int();
+    bool   exact_match    = false;
+    if( params.size() > 2 )
+        exact_match       = params[2].get_bool();
 
     set<string> retStrings;
 
@@ -1548,7 +1590,11 @@ Value listusernamespartial(const Array& params, bool fHelp)
         BOOST_FOREACH(const PAIRTYPE(CKeyID, CKeyMetadata)& item, pwalletMain->mapKeyMetadata) {
             LOCK(cs_twister);
             BOOST_FOREACH(const string &user, m_users[item.second.username].m_following) {
-                int toCompare = std::min( userStartsWith.size(), user.size() );
+                if( (exact_match && userStartsWith.size() != user.size()) ||
+                    userStartsWith.size() > user.size() ) {
+                    continue;
+                }
+                int toCompare = userStartsWith.size();
                 if( memcmp( user.data(), userStartsWith.data(), toCompare ) == 0 )
                     retStrings.insert( user );
                 if( retStrings.size() >= count )
@@ -1566,7 +1612,11 @@ Value listusernamespartial(const Array& params, bool fHelp)
         BOOST_FOREACH(const CTransaction&tx, block.vtx) {
             if( !tx.IsSpamMessage() ) {
                 string txUsername = tx.userName.ExtractSmallString();
-                int toCompare = std::min( userStartsWith.size(), txUsername.size() );
+                if( (exact_match && userStartsWith.size() != txUsername.size()) ||
+                    userStartsWith.size() > txUsername.size() ) {
+                    continue;
+                }
+                int toCompare = userStartsWith.size();
                 if( memcmp( txUsername.data(), userStartsWith.data(), toCompare ) == 0 )
                     retStrings.insert( txUsername );
                 if( retStrings.size() >= count )
@@ -1583,3 +1633,33 @@ Value listusernamespartial(const Array& params, bool fHelp)
     return ret;
 }
 
+Value rescandirectmsgs(const Array& params, bool fHelp)
+{
+    if (fHelp || (params.size() != 1))
+        throw runtime_error(
+            "rescandirectmsgs <username>\n"
+            "rescan all streams of users we follow for new and old directmessages");
+
+    string localUser = params[0].get_str();
+
+    std::set<std::string> following;
+    {
+        LOCK(cs_twister);
+        following = m_users[localUser].m_following;
+    }
+
+    BOOST_FOREACH(string username, following) {
+        torrent_handle torrent;
+
+        {
+            LOCK(cs_twister);
+            if( username.size() && m_userTorrent.count(username) )
+                torrent = m_userTorrent[username];
+        }
+        if( torrent.is_valid() ){
+            torrent.recheck_pieces(USERPOST_FLAG_DM);
+        }
+    }
+
+    return Value();
+}
diff --git a/src/twister.h b/src/twister.h
index 38233776..913b985d 100644
--- a/src/twister.h
+++ b/src/twister.h
@@ -11,7 +11,7 @@
 #define USERPOST_FLAG_DM 0x02
 
 #define BLOCK_AGE_TO_EXPIRE_DHT_ENTRY (2016)   // about 2 weeks
-#define BLOCK_AGE_TO_EXPIRE_DHT_POSTS (4320*6) // about 6 months
+#define BLOCK_AGE_TO_EXPIRE_DHT_POSTS (4320*2) // about 2 months
 
 
 class twister
@@ -23,6 +23,7 @@ public:
 void startSessionTorrent(boost::thread_group& threadGroup);
 void stopSessionTorrent();
 
+bool getUserPubKey(std::string const &strUsername, CPubKey &pubkey);
 std::string createSignature(std::string const &strMessage, CKeyID &keyID);
 std::string createSignature(std::string const &strMessage, std::string const &strUsername);
 bool verifySignature(std::string const &strMessage, std::string const &strUsername, std::string const &strSign);
diff --git a/src/twister_utils.cpp b/src/twister_utils.cpp
index 9e066b71..cfd72fe7 100644
--- a/src/twister_utils.cpp
+++ b/src/twister_utils.cpp
@@ -137,8 +137,8 @@ int saveUserData(std::string const& filename, std::map<std::string,UserData> con
     for (i = users.begin(); i != users.end(); ++i) {
         UserData const &udata = i->second;
 
-        entry &userData = userDict[i->first];
         if( udata.m_following.size() ) {
+            entry &userData = userDict[i->first];
             entry &followingList = userData["following"];
             BOOST_FOREACH( std::string const &n, udata.m_following) {
                 followingList.list().push_back(n);
@@ -146,6 +146,7 @@ int saveUserData(std::string const& filename, std::map<std::string,UserData> con
         }
 
         if( udata.m_directmsg.size() ) {
+            entry &userData = userDict[i->first];
             entry &dmDict = userData["dm"];
 
             std::map<std::string, std::vector<StoredDirectMsg> >::const_iterator j;