Battlefield 3 expansion "Aftermath" launches today for Premium players on PS3, so you know what that means: patch time.
Available now or later today on consoles and December 4 on PC, the latest update alleviates the input lag and audio drop-out issues for PS3 players, tweaks quite a few weapons, fixes a few bugs (now you disarm MCOMs from all sides), balances the gunship (no more thermal optics or massive splash damage), and changes medal requirements (Recon players will be especially happy with that last one). Regarding the Gun Master issue on console, DICE says they'll be deploying a fix for that as well in the coming days.
Most of the weapons get a buff (particularly the G53, LSAT, Type 88, M26, and Rex), but there are a few that get nerfed some -- namely the M416 and UMP.
Boot your console now to grab the patch (check back later today if it's not live yet), and hit the source for the full notes if you like.