Here is what I got from TicketBastard:

Hello, this is Ticketmaster Customer Service with an important alert for your upcoming event. Please be advised the originally scheduled performance of Ozzy Osbourne scheduled at the Cumberland County Civic Center originally scheduled for January 01, 2008, with a rescheduled date event showing on Thursday, January 31, 2008, at 7:30PM, has a performer change.

Rob Zombie will not be performing, and Ozzy Osbourne will perform as scheduled.