Imagine my surprise when I turned my pc on today to find that the favicons assigned to my bookmarks had either completely disappeared to be replaced by the generic IE icons, or, somewhat more bizarrely, had decided to 'move house' - for instance, anybody who could not read would think from the icon assigned to this site that they were going shopping on Amazon....

How do I put this situation right? I have a looong list of favourites and I need those little guys on impatient days..

I'm running IE7