Uncharted 2 BETA Patch

Here is all the info from PS Blog:

Here’s what this beta patch will address:

General: Grenade explosions now apply damage properly

Matchmaking: Players should no longer get hung up in matchmaking for long periods of time

Bug Fixes: Ranks should no longer reset randomly

Quitting the game will no longer reset the PS3

Player collision – players should no longer get hung up on each other when moving through the environment

Player will now be killed if stuck in falling animation for too long

In Plunder mode, treasures will no longer disappear during matches

Note: ALL RANKS WILL BE RESET WITH THE PATCH