Got an issue here with the create plugin, I'm using mktorrent for this.
After creating the file, everything seems normal (no errors in log), but when trying to add the newly created .torrent file it says in uTorrent: Unable to load "****.torrent": torrent is not valid bencoding! and in Deluge it says: Not a valid bencoded string.
Using Rutorrent 3.5 and latest create plugin. Creating a torrent with mktorrent in cli works fine.
Sample .torrent file attached.