My experience:
When 3.0 was first released, I had it up and running within minutes.
But the old pianos (C2 Chamber) did not appear.
Then PT announced that there was a "bug", and that it was fixed.
I downloaded the fixed version of PT 3.0 and reinstalled it.
Following the "Dragon's" method (it's different than the old way - follow the instruction), everything works just fine.
I now have all the C1's, the C2's, the Erard, the Shantz, the Graf, etc.
But the Electro-Acoustic, the Marimba, Metalaphone, and Pianorga are GONE. They didn't like these and killed them.
However, the new Hybrid is really very nice (as Evil Dragon has pointed out in another thread).
Good luck - perhaps an uninstall and reinstall will help.
Glenn
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Procrastination Week has been postponed. Again.