Don't know about anyone else, but even when I get the above error on XP SP2, my torrents still download fine !!!

Bizarre I know, but everything I've downloaded seems to work OK, even with the error.

I'm with Karoo too and get the same problem, i'll try the blocklist and see if it works.

[EDIT] Can someone explain how it works ?

I get the same problem, constantly, Its a shame as Deluge was working well. As it is its totally unusable on Windows.