Since we're talking about Firefix crashes: The preview release used to and the current 1.0 (Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7.5) Gecko/20041109 Firefox/1.0 (MOOX M2)) will crash consistently for me. It took some sleuthing to figure it out. Full cache. I've specified cache to live on another partition in a temp folder. No matter that that partition has oodles of disk space, once FF fills the cache, it will crash for me. I wrote a small batch file that clears the cache on boot-up (which happens every morning), so we'll see what happens now. I'm on W2kPro SP4.