I was at BCV 6/25-7/1/06 and when we asked to use snack credits for the gelato we were told that you can't use the snack credits. YOu can use them for some boxes of donuts or pastries (same at Boardwalk Bakery). We could use them on a box of mixed donuts, but not on cinnamon buns because they were over $4.
Also, at the OKW store the guy told me we could anything for $4.00 and under for a snack credit. I knew he was wrong (because of the info from the boards here). There was a problem when he wrang up the stuff. He kept trying, but I told him to take off the $4.00 item I had and voila! it worked. He said they were told anything $4.00 and under, but it's really $3.99 or less.