VW2008 on Dual 2 GHz PowerPC G5 running 10.4.11.
When I go to move object with the mouse, the screen will jump around on me so that when I release the object, it is pasted in the wrong place. Double pressing "z" refreshes the screen to the correct location, but then my viewbar ends up jumbled and unreadable for a few minutes. It hasn't prevented me from production too much, but it is extremely annoying.