On 2 of our Windows 7 SP1 computers, favorites aren't available in Internet Explorer (version 8 or 10). And it's not possible to add anything, also.
Favorites are redirected to the user's home directory. Redirection is doing well, no errors in Folder Redirection's event log. Users Shell Folders registry values are great. The users can access favorites thru Windows explorer. Updating from IE 8 to 10 didn't help. Recreating users' profiles neither.