Any help appreciated....

One user has two copies of the "Frequent Contacts" folder. Both named the same, both show as containing the same stuff (802 contacts in each, etc).

I can't rename, delete or get rid of the duplicate. If you look in the users address book only 1 copy of frequent contacts shows there! It's just in the main mailbox pane that shows 2.

I've run a gwcheck analyze/fix and a structural rebuild with no positive results. Appreciate pointers.