I'm having the same exact problem. It took me a while to figure out it was flash that was crashing my browser.
The only difference is, I'm on x.org, not xfree, so it must be a firefox bug and not from xserver.
[EDIT] Now that I think about it, maybe it's a graphics driver conflict with firefox? I haven't really tried flash with my other browsers, though.
[EDIT] Ehm, just get Adblock Plus (I read about this in some other forum, but I unfortunately forgot which). Solved it for me.
Last edited by BleachedShut; 02-14-2006 at 12:10 PM.