Naughty Dog has issued a new patch 1.01, in North America to counter some of the issues people have been having with the Uncharted 3 beta, while the EU patch is promised soon.
Evan Wells, co-founder of Naughty Dog explained via twitter “the patch was primarily to fix the frequent slowing of the framerate that would eventually lead to freezes. EU patch on it’s way.”
Additionally if you are having trouble with the game then you are advised to log all the way out of the beta into the XMB and then relaunch the Beta to get back in. If you’re having trouble downloading the update and especially if you’re having trouble getting the config file, delete the GAME DATA only from your XMB and relaunch the Beta.
We will update you as soon as we hear more.