PSN portion of speed/internet test on the PS3 failing due to 'wrong email/password'...
I tried rebooting my modem(which took 3 tries before the send/receive icons would stop flashing blue) and the system and even changing the password to something different.
FYI: I had the same issue with PSN not wanting to let me log in on my PSP Go due to 'wrong email/wrong password' a few months ago.
Very very weird.
I know I changed my password when I sold a super slim PS3 a while back without deleting my log-in on it. Yet the guy I sold it to at the local flea market still had it when I went there about a month ago and I had the PSP issues before that.