The wailing in Microsoft's user forums over the Skype transition from the "Classic" version 7 to the somewhat feature-lite world of version 8 has continued even after the axe finally fell last year.
I lost track of the times when the client returned an "invalid password" error message, or hanged, or worked until you videocalled and were rewarded with a black window instead of the video. All of this meant "you must update to the newest version before logging in".
So, bodes well, then.