does it quit with the official blender build from 2.62 blender.org?
its kinda hard to say… without the files obviously…
i use the 64bit windows version 2.62 from blender.org and have rendered animations just fine…
not sure what the problems is… ??
no, I got plenty of RAM headroom…I have 6 gigs…never come close to maxing it out. never an issue in 2.60a or prior…
I just establish it crashes also on a Mac Book Pro running snow leopard…
so…2 machines, 2 versions of OS X.
maybe if I look at those things needing ray tracing and start eliminating them?
Hm, sounds more efficient to do it the other way around - start from empty, add stuff until it goes wrong. If a render starts out OK… cancel it.
But it’s hard to say without knowing anything about the contents of the scene. What sorts of ray tracing-related features are used?
Have you tried the most recent graphicall builds to see if it’s maybe fixed already?