I'm curious: on the Mac, Skype went through a major regression in terms of usability from 3? to 4? (I forget exactly which major version change it was; I do kno

I'm curious: on the Mac, Skype went through a major regression in terms of usability from 3? to 4? (I forget exactly which major version change it was; I do know that 6.xx is not significantly different from the version everyone I know avoided upgrading to until they were forced) -- did this not also happen on Windows?