I have noticed that if any of the default directorie in your profile directory are erased, Mozilla does not recreate them again. I manually erased all of my profile information in my profile directory, except my bookmarks, when my profile was causing page faults in the browser. I then noticed that th profile directories where not being recreated which caused a problem with newsgroups, etc. until I manually recreated them.
Reassigning to profile backend
WFM on 2003061008 win32. Reporter: can you reproduce?
No update from reporter.