Ugh, got a message from someone on Xbox Live that Season 5 was out, started up Pinball Arcade... and all my data was wiped. Exited TPA, quit it, and started again, still gone.
I haven't paid much attention to this topic before because I had no problems. Is there any way that I might be able to recover it all - I had a lot done, too, including being the only person (that I know of) that had all the achievements. Glad those are still awarded, but all my progress that earned them is gone. *sniff*