http://bugs.winehq.org/show_bug.cgi?id=8038
------- Additional Comments From rnorton@bittorrent.com 2007-12-05 00:51 ------- The problem in uTorrent was that it was passing an item greater than the last for the third parameter of CheckMenuRadioItem. Windows allows this but Wine does not; Wine returns FALSE from CheckMenuRadioItem but does not set GetLastError as well.
I've fixed this for upcoming uTorrent betas but for bug-for-bug compat wine might want to look into this.
Ryan Norton