The Battlefield Vietnam Update 1.01 is now available for all owners of the game. As noted in our last community update, this includes community-related bug fixes, significant network improvements and a few balancing tweaks.

SERVER FIXES
General optimizations to reduce server lag
CDkey hash added to game.listplayers output
game.listPlayers uses the new format:
#Id: - is remote ip: : hash:
Gamespy port setting fixed
game.gameSpyPort - now working
game.gameSpyLANPort - now working
game.ASEPort - removed (not supported by ASE)
All Seeing Eye updated
Battlefield Vientam games no longer appear in Battlefield 1942 ASE list
Player details should appear correctly in ASE server list

CLIENT FIXES

Sort by Ping fixed in Server Browser
Scrollbar fixed in Server Browser
Soldier prediction fixed to remove jerky movements when walking/jumping
M60 removed from the LAW kit and replaced with M14
M60 and RPD min/max bullet deviation increased when standing/moving
M60 and RPD max bullet deviation decreased slightly when prone
Rate of fire and velocity of M60/RPD adjusted
Player movement speeds on Heavy Assault kits reduced slightly
Network overhead of vehicle engines and airlifting significantly reduced
Added minimap warning icon when enemies are within capture radius of an opposing team flag

Source: EA Games | Battlefield Vietnam