I still have it in V4. Had in V3. Was it there in V2 as well? I'm almost resigned to it.
I just grab the middle zoom bar (between the "+" and "-" buttons) and jiggle it around and it seems to reset the zooming.
I recently was working on an Apple system without a scroll bar and nearly went insane with frustration. It's amazing how integral the wheel has become to my using computers in general and Vegas,Acid,Sound Forge in particular.
A fix would be nice.
bgc