3.0 came out in August and was mandatory.  I had no problems with that.  3.01 is out now, came out like last week, and after a few days I have this problem.  I don't know if they are related or not, but since 3.01 wasn't mandatory I did it manually and as the article says, the failures came within a few days of the update.  If it was really a firmware issue, I would have expected to see an issue immediately.  I tried playing Gladiator just prior to the update and everything was fine, but I did not try anyting disc based after that.  I was playing the Sigma 2 demo when it just died out of the blue.