We are currently working on the RadTransitionControl and will try to fix any problems with the CLR transition. The only problem we could experience now is that the new content sometimes flashes at the start of the animation. I believe this is not the problem you are experiencing since you described it as "SlideAndZoomCLRTransition doesn't work" and it sounds like no animations starts at all or something like that. Could you explain in few words what is the behavior you are observing?
the Telerik team
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