Shrug. I'm just very used to being able to zoom in and out with the mouse wheel. It's loads more useful than *cough* scrolling vertically, which is already accomplished (more exactingly) with the space bar/mouse combo. Ctrl - and + are poor substitutes, not least because they require both hands, or an uncomfortable contortion of the right hand, and more specifically because AE's default system is just better.
So how do I get this working? (Flash CS3 if it matters.) Thanks.