I'm not sure of the cause or solution, so the article name is up in the air; but @ memmove is a top crash. The crash bug is bug 498530.
That bug says it's fixed in 3.5 RC2 so the solution is to stop using 3.5beta4.
Bug 498530 is only one of this kind of crashes, there are still crashes out there that have this stack at the top.
Notes for the article: - it looks there are various causes - Mozilla knows about it and is working on a fix
Article is up. Left the @ out of the title, please insert if it works with our wiki. Marking fixed for review.
Reviewed and moved to KB at: Wed 19 of Aug, 2009 23:27 EST