Just recieved this today:
A new credit card guarantee for California Grill at Disney's Contemporary Resort will be effective for all reservations confirmed for Friday, Oct. 21st and beyond. A credit card is required at time of booking as a guarantee.
Guests will be advised that a $20 per person cancellation fee will apply for cancellations within 24 hours or for no shows. All previously booked reservations will require a credit card guarantee if any modifications are made.

Just thought you'd like to know