Wrap the UTTypeTagSpecifications in arrays, as Xcode does.
@ -88,13 +88,17 @@
<key>UTTypeTagSpecification</key>
<dict>
<key>com.apple.ostype</key>
<string>TORR</string>
<array>
</array>
<key>public.filename-extension</key>
<string>torrent</string>
<key>public.mime-type</key>
<string>application/x-bittorrent</string>
</dict>