Same thing here. I am glad it is not just me. I just installed some custom themes yesterday via flash and thought they were the problem. I reset the PS3 to factory settings and nothing changed. My dynamic themes are corrupt and I can not play any games that I have purchased from the PSN, or sign in. They all throw this same error code. I can still use my PS3 media player with no problems. Why would this have an effect on previously purchased games? I did not think they had anything to do with being signed in.