I am running FCE 3.5 HD on a Macbook Pro and whenever I start rendering, it (FCE) unexpectedly quits. Here’s the crash report:
I have no idea if this will even help, as I have no idea even how to read it...but....
UPDATE: I am still having the problem, but not necessarily from rendering. Just moving video around can cause it to quit. Or selecting "Show video filmstrips"
EDIT: I sent a bug report to Apple. We'll see what they say.