The latest SOCOM 4 patch is now live. The team is saying 42MB, but it loads up at 42, and then when you go online… Be prepared for a 4 part download with parts as big as 320MB! It appears they are still working on the weapon knock to prevent rapid fire hacks, which is a good thing.

Gameplay
– Using the knife no longer silences footsteps
– Classic mode mic system has been changed from Tap-to-Talk to open chat
– Fixed Classic Bomb Squad double round win bug
– Reduced the accuracy of SMGs at long distance
– Grenade launchers no longer kill the user when fired at long distances or over a wall
– Reinstated weapon accuracy when quickly tapping fire button
– Several level collision issues have been adjusted

Party and Clan Systems
– Party leaders may now optionally allow party members to invite in other players
– Numerous Party system stability enhancements
– Numerous Clan system stability enhancements

Interface
– Player counts on map voting screens are now accurate
– Fixed round transition freezes
– Numerous UI element bugs have been fixed

Source:Socom.Blog