Been troubled lately by that pesky DNS error? Notice that your PS3 can still browse the net, but not log in? Happen to be a Roadrunner customer? Well then read on...

The main issue turns out to be a Roadrunner DNS problem. The fix is simple. When configuring your PS3 network (regardless of wired or wireless), use the manual option. If you use DHCP, leave address resolution at automatic BUT CHANGE THE DNS SERVER ENTRY TO MANUAL.

I replaced the Roadrunner DNS entries with addresses from the Open DNS project which is a free, secure DNS server that anyone can use.

The DNS addresses are:

208.67.222.222 or/and 208.67.220.220

Once replaced, you should have no problem logging in.