I'm on a Quad G5, working on animations, and designs, especially ones that include embedded flv is causing Flash to crash very very frequently. I don't have any 3rd party plugins installed, it's a fresh 10.0.2 install. I am usually writing code; is it always like this? Is it just me, should I try reinstalling or something?
Do you have the latest Flash CS4 update? I believe it may address some stability issues - see the knowledgebase article here:
and as I re-read your post, yes you do have the latest update. Hmm...Anything running in the background while you're using Flash? Any particular sequence of actions that definietly causes it to crash?