The "lag bug" I assume your talking about what I call "stacking audio", where it seems to queue a lot up?
Well, I have that on every fresh install I do since win 7 (I have my own vent server). I always fix it by either by giving vent adming, or actually, disabling UAC. It takes a reboot. But it works.
But, TS3 has come on leaps and bounds. I avoided TS2 like the plague, but a buddy of mine runs a TS3 server, and it works really well, I was shocked.
Though, thread high jack. This mumble. Does the server files come unlimited slots? Also, whats the server resource useage like on *nix? Id be quite tempted to replace my vent with mumble if its as good as people above are claiming.