Playing with today's build (2000-09-07-04), I found it fairly easy to crash after a bit of web surfing, opening and closing new windows. The stach trace is always the same, see the attached log file.
My fault, I guess... I also had some problems with the cache: it displayed images from previous sessions, or sub-pages instead of home-pages. I deleted my User directory, restarted and everything works fine now. Closed as Invalid.
Reopening to mark as duplicate, for statistical purposes.
Duplicate of one of the cache crash bugs, which dp seems to have fixed today. *** This bug has been marked as a duplicate of 48292 ***