I am having the same problem, looks like it might be related to using a Macbook and synching with Missing Sync:
http://forum.ppcgeeks.com/showthread...ple+tab+TF%23d
I am trying to see if deleting my photos in the contacts information will get it back working again.
I get the PEOPLES tab working fine after a ROM flash, then it quits working after I synch contacts.
GMCPCS