http://bugs.winehq.org/show_bug.cgi?id=33460
--- Comment #29 from Dan Kegel dank@kegel.com 2013-05-10 11:33:01 CDT --- Great detective work! But as Alexandre says, it's a problem with the mouse. What does lsusb report for that mouse? (apologies if you've already said that and I've missed it.)
Have you submitted a bug report to the mouse/mouse driver vendor yet, per http://www.winehq.org/pipermail/wine-devel/2013-May/099769.html ?
Also, think this should be closed as invalid, since it's a bug in the mouse or its driver?