http://bugs.winehq.org/show_bug.cgi?id=7800
--- Comment #18 from Marco Schuster marco@harddisk.is-a-geek.org 2008-02-16 05:06:39 --- I have the same problem sometimes, but this is because my mouse-wheel (in the hardware itself) is broken, check please if your mousewheel is in an "intermediate" position between two ticks, this can cause unpredictable behaviour. Can you please also post the result of "ls -lah /dev/input" and of "id -a" (both run as your normal user, not as root)?