Fourzerotwo (Robert Bowling), Community Relations Manager from Infinity Ward, has posted the following information regarding a PS3 COD4 update and user troubleshooting tips on the official Infinity Ward forums.
"Wanted to give you guys a heads up on some updates coming to the PS3 version as well as some troubleshooting for those of you experiencing connection issues, especially those attempting to play within Dorms.
The first patch will be a Optimized Connection Patch, First the troubleshooting, those of you experiencing connection issues should check your router and make sure the following ports are OPEN:
This is the cause of why your Xbox 360 may work online, but your PS3 would not, as the Xbox 360 uses Port: 3074 UDP which is default open for Xbox Live compatible routers, however the PS3 version is using BOTH Port: 3075 (which is default closed for the majority of routers) and 3074 which should be default open.
Please ensure your router has 3075 UDP and 3074 open, information on how to open ports on your router should be found in your individual router's manual or website. This is a temporary solution, the optimized connection patch will fix this automatically once it's released.
Now for the Optimized Multiplayer updates, we've taken a lot of your community feedback and have been working on a patch for the PS3 version which we plan to release once complete, no ETA on when it will come out as it has to go through certification with Sony, however the update will address and add the following:
Identify party by Background Color (in Lobby)
Optimized Server selection for first match for better connections
Improved network performance for 18 player games
Optimized 'Chase Cam' when Spectating
Fixed Playlist error when attempting to join from other games
Handle Corrupt Create A Class data instead of kicking player
Added Kill cam to Airstrike bombs and Claymores
Added the ability to Mute Players on PS3
Added Recently Met Players on PS3
Tweaked the following Oldschool Mode Settings based on feedback:
- Added Unlimited Sprint
- Increased Magazine Size
- Added Ragdoll Cam
and finally, something we're working on getting into it by the time it hits you:
Addition of Host Migration so if Host Leaves auto-chooses next best host"