http://bugs.winehq.org/show_bug.cgi?id=33895
--- Comment #15 from Ken Thomases ken@codeweavers.com 2013-07-10 11:30:00 CDT --- Created attachment 45181 --> http://bugs.winehq.org/attachment.cgi?id=45181 Don't discard mouse-move events until catch up to SetCursorPos time
Instead of reverting that commit, could you try applying the attached patch and see if that helps?