Ok,im downloading a file wich is 95.6mb ktorrent shows that i have downloaded all 95.6 mb but torrent is 76.52% completed.
http://users.hol.gr/~mesrin/snapshot4.jpg
Then i restarted ktorrent and i get that 74.5mb of 95.6 are downloaded and 76.52% completed which is now normal.
http://users.hol.gr/~mesrin/snapshot5.jpg


Using ktorrent 2.02

my guess, someone is sending bad data, so it's being discarded.