http://bugs.winehq.org/show_bug.cgi?id=14188
--- Comment #3 from Austin English austinenglish@gmail.com 2008-10-07 12:43:07 --- (In reply to comment #2)
I too suffer from the same problem in ubuntu 8.04/wine 1.1.5/utorrent 1.8.
I had to downgrade to 0.9.36 amd64 to fix the problem. Peers can now successfully get above 1MB/s when uploading to them, rather than dropping with peer error 10022.
If it is a regression, run a regression test: http://wiki.winehq.org/RegressionTesting