An update to Counter-Strike: Source has been released. The update will be applied automatically when you restart Counter-Strike: Source. The major changes include:

• Added 64-bit Support. 64-bit binaries will automatically be launched on systems with a 64-bit OS.
• Added a borderless window option to video settings
• Added bicubic lightmaps (from Half-Life 2: 20th Anniversary Update)
• Added radial fog (from Half-Life 2: 20th Anniversary Update)
• Added support for Steam Networking
• Added UI scaling for high-resolution screens
• Made the default server name for listen servers include the player's name
• Made the game launch in native resolution by default instead of 640x480
• Client-side prediction fixes (these fix 'jank'/rollback in certain situations)[list]
• Fixed a bug where when unducking, the view could glitch out if the player doesn't have space to unduck
• Fixed gifts not randomly dropping when players are killed during the winter event
• Added sv_autobunnyhopping so bhop servers can have this wanted behaviour with client-side prediction
• Fixed a prediction bug where if the player was moved on the client, their input-based movement for that tick was not taken into account in non-player actions
• Improved prediction for walking on props and other entities
• Made certain client-side entities only trigger local prediction errors[list]
• e.g. If the viewmodel experiences a prediction error, the player will not experience a prediction error

Fixed prediction of viewmodel sway

Fixed a prediction error regarding weapon idle animations[/list]

Fixed certain breakable props not gibbing correctly

Fixed an issue where certain variables like position would not be updated correctly to match the server in certain situations

Fixed the player's base velocity (eg. conveyors, moving items etc.) getting subtly out of sync from client/server

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