It could be the drum if the cake is so heavy that it is flexing when you pick it up. If it was a smaller cake than I would guess not. I normally use just a dab of water to glue fondant to fondant, but I recently picked up a bottle of Sassie Sap edible sugar glue and it really does a good job of gluing things down.
Jenniffer White, Cup a Dee Cakes - http://cupadeecakes.blogspot.com
