Source: Steam
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Updates to Battlestations: Midway have been released. The updates will be applied automatically when your Steam client is restarted. The specific changes include:
Battlestations: Midway
-Lower bandwidth usage when playing multiplayer games Multiple clients connections now allowed from the same IP adress
-Bug fixed which prevented some players to connect to games via LAN
-GameSpy servers no longer appear in LAN browser
-Inclusion of a connection-meter to the multiplayer menus
-'Surrender' option added to the ingame multiplayer menu
-The game no longer stops the Windows screensaver
-Fix for the multiplayer map 'Islands of Solomon'
-Fix for a mission-end camera issue with the multiplayer map 'Operation MI'
-Foliage trees no longer have the black outline
-Fixed an issue with the ships' flags
-The propeller on the "please wait" screen is now rolling
-The multiplayer code now includes the GameSpy NAT Negotiation feature