I have had this problem and they all told me that it is the board you use under the cake. Its not strong enough. I have not tried it yet but they say use 1/2 in foam board or masonite board. Or its you bc is too dry.
Thank you... the board was the furthest thing from our minds! It makes sense, we moved it to take the pic and the board was not all that stiff.
thank you, thank you!
that and also temp change effects it to..if it goes from cold to hot it can crack as well.