~Thats the only way you can change the skins is if you set each yahoo id on classic setting..it was always that way, even if you added the per user setting...you still had to go in preferences and set each one on Classic..I've had the per user application in the WB config since yahoo 6.0 was beta. It may not need it now ...
The version your using now is fairly new, but I think ill leave well enough alone, mines fine for now. Mai needs the fixing...