@89014EL,
No, I haven't even installed the beta 29 software due to the current issues with it. In this particular case, though, I haven't really assumed anything. The skins won't be compatible simply because of the change in the interface layout (to accommodate the new calendar system) and because of the way the program uses pictures to build the interface.
I will retract my use of the word "unusable" though. It'll probably be usable, just not necessarily fully functional.
Take it easy!