THQ and Volition have released a new auto-update for Saints Row - fixes some multiplayer issues and adds 4xAA and V-Sync.
The new update will download and install when you next load up the game, and according to Volition should fix up all the lag problems players have been experiencing. There are also fixes for several known exploits, including clothes stealing.
If you're someone who has been making use of some of the fixed exploits then you'll be sad to hear that you won't be able to play online again until the update is installed, so you better say goodbye to your days of clothes stealing.
Also with the update comes some new in-game visual enhancements and tweaks. For 480i and 480p modes, the game has been patched to run with 4xAA instead of the usual 2xAA, so you should notice less jagged edges. There's also a new option to enable v-sync in both cutscenes and gameplay. This should eliminate screen tearing, but will have a detrimental affect on the frame rate - it's your choice.