Bookmarks missing after installing Firefox 2 on Windows
http://kb.mozillazine.org/Lost_bookmarks

"Lost bookmarks
From MozillaZine Knowledge Base

This article deals with lost or missing bookmarks, recovery methods and future prevention."

Remember I had problems when I upgraded to the new Firefox 2? Well, seems it's happened to a lot of people, not just me. Someone kindly posted this link elsewhere and I thought it might be good to have here in case it is needed by someone else in the future.