When I do start Ktorrent this come:

An error occurred while loading the torrent /home/woda/%i:
Unable to open torrent file /home/woda/%i : No such file or directory
The torrent is probably corrupt or is not a valid torrent file.

&

An error occurred while loading the torrent /home/woda/%u:
Unable to open torrent file /home/woda/%u : No such file or directory
The torrent is probably corrupt or is not a valid torrent file.

what to do with it?
I use LinuxMint 10 & KTorrent 4.0.3

Version ?

What plugins have you got loaded ?

on 24.11.2010 i started Ktorrent with out changing anything two times without any message no start. I hope everything is back to normal.
(I had the problem on 22 and 23 November.)

Plugins:
UPnP
Scripting
IP Filter
Search
Magnet Generator
Zeroconf
Shutdown
Scan Folder
Brandwidth Scheduler
Download Order
Information Widget
Statistics

Scan Folder is: /home/woda/Downloads/
inside 7 sub-folders 0 files

It is back to normal.