A few weeks ago both the X360 and PC versions of TF2 were patched and today Valve has released a new patch for the Playstation Network, which brings the PS3 version up to date.

Though there is a fix for the memory "to improve single player stability" in the Orange Box, most of the tweaks are for Team Fortress 2. Specifically addressed problems include a graphical glitch leaving an explosion effect after a rocket jump, player names not appearing on the stats screen, vote tallies disappearing between rounds, and some issues with the EA leaderboards and servers. It also fixed some minor crashing problems and an occasional issue with seeing the "Players Met" on the XMB.

Source: 1UP