I upgraded to 2.2 yesterday and am having some huge problems:
1. Instead of crashing the way previous versions have, allowing me the option to submit a crash report, the program just stops responding (the tool bar reads "Not Responding"). I would normally leave it be and hope it recovers after a bit, but leaving it overnight still left it in that state. I have to force quit through Task Manager almost every time. This would not be so bad if it didn't happen every 15 minutes or so.
2. Every time I reopen my projects, the groups are completely rearranged, mostly on top of each other so I can't see the panos. The project I'm working on right now has 147 panos, so they're all organized in groups, and having to rearrange them every time I reopen the project (after yet another crash) is pretty awful.
3. The program seems to forget it's registered every time I reopen it after one of these crashes. I have to enter my registration information every time I start up the program.
I'm really excited that my project no longer takes a full hour to load when I open it, but at least I got to work on it after it finished then.
Are you using a 32-bit or 64-bit version of PT/PTP and on which OS?