Battlefield 3 has a patch. It's a big one. According to EA/DICE the patch was rolled out during "a scheduled down time on Nov 22 between 07:00-09:00 AM UTC,during which you will not be able to play the game." PATCH NOTES
Selected improvements in the Nov 22 Battlefield 3 client-side update
A full list of changes is available on the Battlelog
General performance and loading time improvements
"Black Screen" fix for an issue occurring on some PC configurations
Stereo and rendering support for Nvidia and AMD graphics cards
Fixed several crashes that occurred when joining multiplayer and co-op sessions
Fixed a problem with high speed mouse movement (aka "negative mouse acceleration")
You should no longer be able to damage a friendly vehicle when sitting in an open position
Grenades now drop to ground if you get killed while attempting to throw it (dangerous in Hardcore mode!)
You should no longer spawn too close to enemies in TDM, SQDM, or Conquest
A large number of damage and range tweaks on a number of weapons to fine-tune overall balance in the game
Added round duration and ticket summary at End of Round screen
Fixed a problem regarding key bindings while playing
Significant changes to the Join Squad interface, detailed at the bottom of this post
Selected improvements in the Nov 22 Battlefield 3 PC server-side update
A full list of changes is available on the Battlelog
EOD Bot exploit fix
Several crash fixes
Anti-stat padding measures taken, disallowing ranked servers to run obscure settings
Improved team kill kick configuration
Support for unranked servers. Unranked servers do not report players' scores to Battlelog, but server administrators can freely control all settings
Newly added Battlelog functionality Share your stats
Ability to share your Profile and Stats pages to Facebook, Google+, and Twitter
User Profile and Stats pages on Battlelog can now be accessed without being signed in to Battlelog if you know a user's URL
Single sign on from Battlelog to Origin. If you're not logged in to Origin and join a game server, Battlelog will automatically sign you in to Origin in the background and join the game server
Quick notes on Squad changes in the Nov 22 update
Removed FIND ME A SQUAD option
Allow players to join empty Squads alone, thus having 1/4 squad members
Change order of options to LEAVE SQUAD, INV A FRIEND, SWITCH TEAM
Disable Privacy flag when 1 man squad
Reset Privacy flag from Private to Public when squad drops to 1 player
All occupied Squads will now show up colored blue on the Squad Selection screen
Players who choose not to join squads will also show up as Blue in the "Not in a Squad line
Squads that are currently empty will display as white -- if you wish to join an empty Squad, you can choose the first one marked with white text
Full list on BattleLogSource:
EA