This happened to me all the time before it went down due to the hacking...and it will continue to happen....just connection issues or server issues, it shouldnt last long. Also, wrong forum.
I used to get that a lot. It disappeared when I got a better internet connection and router. I've found it's usually caused by a temporary loss of connection (the green light will appear to stay on so you won't notice it).
Thanks but, I was playing last night with no problems. Have you been in a room for awhile? I bet if you signed out and in it wouldnt work. This has to do with me playing GT5 and not signing in to psn, so it does belong here..Im asking people if their playing GT5 and cant sign in to PSN.
This is happening to me frequently but it's only when playing GT5 online and it never ever happened before the PSN breach.
And then it won't let me sign back in, only after 10min or so.