ktorrent does not work correctly with gazelle engine trackers like what.cd, passthepopcorn.org, tehconnetction.eu and others. it's seed and leech but often show in tracker's status "Connection to host tracker.what.cd/tehconnection.eu/please.passthepopcorn.org is broken."
sorry if i mistake in english

also this only in 3.2.1. latest versions has not this trouble