bookmarks deleted in 1.1!

[Jens]

I have upgraded from 1.0 to 1.1 20020827. The new version deletes my 
bookmarks once in 1-2 days!
I have user_pref("browser.bookmarks.file", 
"c:\\bookmark\\bookmark.htm"); with C: being a FAT drive.
The size of the bookmarks is 638k.

Jens