Hi, Ktorrent is looking good. I did find this bug though. The torrent happily continues to download a few chunks repeatedly. Chunk number 1137 in this torrent is one that you can test with. The effect of this is that once this chunk gets lined up for download, the download essentially spins it's wheels.

The torrent I found this with is:
http://inferno.demonoid.com:3389/announce

A file that will cause this chunk to download is:
'Tchaikovsky, Sérénade Mélancolique Op 26.mp3'
in folder:
'Sérénade Mélancolique - Vengerov, Rostro'

I paused and reconnected in order to get different peers assigned to the chunk, but experienced the same behavior regardless.

This is weird, what version are you using ?