Deluge
The auto add function failed to work for me, today.
I usually have a watch folder where another application drops .torrent files. Today they did not add to Deluge. I changed the folder, enabled and disabled and reenabled the function, removed and re-added the .torrents. Nothing worked. Closing and restarting Deluge solved it.
But prior to that, every change or option I tried to change did nothing. But the function worked as recently as last night.
Deluge 1.2.2
Windows VISTA
32-Bit, Home Premium