Thanks Dave,
Here’s some additional information:
After Effects version 10.5.0.253 running on Mac OS X version 10.7.4 — dual 2.66 six-core processors with 32GB of ram and ATI 5870 (open gl disabled, render multiple frames simultaneously enabled)
The footage being manipulated is all vector objects of different kinds, mostly AI files with the occasional shape layer and basic solid
The problem does not occur when I create a new project and animate a solid using the motion sketch tool. However, if I create a new composition in the project in question, the problem inevitably occurs, whether I’m animating a shape layer, a solid, or an AI file.
No other software running. Have the usual plugins installed — magic bullet, trapcode, plexus, newton
Project file (as well as the successful dummy test) are 32bpc srgb linearized
Let me know if there’s any other info that’s valuable. Boggled by this one. Have attempted minor changes some dozen times and the crash has recurred every time.