Alongside the addition of MP5 there are several other fixes to the game as well which includes some Panorama fixes, matchmaking changes and networks.
A quick review of the changes is as follows:
• Added the all new MP5-SD, available for testing Offline and in Official Casual and Deathmatch servers. It can be equipped in your MP7 loadout slot.
• Added a way to start advertising single-user lobbies to nearby players and Steam Groups members from the permissions dialog.
• Enabled lobby chat when accepting match popup is active.
• Enabled Panorama UI on Windows XP and Windows Vista game clients.
• This update includes a change to “csgo.exe” which, while signed with Valve digital certificate, may still trigger warnings in certain anti-virus packages and require users to manually change their AV software settings to update correctly.
SOURCE
A quick review of the changes is as follows:
• Added the all new MP5-SD, available for testing Offline and in Official Casual and Deathmatch servers. It can be equipped in your MP7 loadout slot.
• Added a way to start advertising single-user lobbies to nearby players and Steam Groups members from the permissions dialog.
• Enabled lobby chat when accepting match popup is active.
• Enabled Panorama UI on Windows XP and Windows Vista game clients.
• This update includes a change to “csgo.exe” which, while signed with Valve digital certificate, may still trigger warnings in certain anti-virus packages and require users to manually change their AV software settings to update correctly.
SOURCE