I have this non-fatal but pretty annoying bug when OA treats Left mouse button (fire) + Right mouse button (jump) when pressed simultaneously to be the middle mouse button (zoom). It acts up not always but when it does it always results in a botched rocket jump

The cure is simple enough: go to settings, repeat assigning the middle mouse button as zoom. After that, everything works perfectly... until the next time I start OA.

I also remember there were (rare) cases when just pressing the middle mouse button mid-game cured the problem.
The bug affects OA from v.0.81(AFAIR) to v.0.85.
OpenSUSE 11.1 (KDE 3.5)
My mouse has a wheel (aka the middle button).