As I mentioned in my previous reply, the RadRotator control does not support scenarios where the items has different size. This restriction is by design and for the time being we do not plan to change this behavior.
the Telerik team
I am not sure you understand the seriousness of your statement. This is a RadRotator limitation and you should take care about it no doubt. The standard adrotator control handles this issue just fine.
This scenario is pretty often and you should offer solution for the problem.