Spent a few hours updating the favicons only to find a few days later that the majority of them have gone again reverted to blank. I have attempted this in the past with ver 13 and had the same experience of losing the favicons. Keeping nearly 300+ bookmarks and trying to insert all the favicons after it they have disappeared is no joke. I run Win XP sp 3 with all updates to date. Never had this with the earlier versions of Firefox seems it started about 7 months ago.