Via [url=https://steamcommunity.com/games/CSGO/announcements/detail/674006995886409298]the Steam Community[/url]:

[quote=Valve][b][u]RUSH[/u][/b]
- Various gap fixes and clipping adjustments.

[b][u]GAMEPLAY[/u][/b]
- Fixed some cases where loud reloads would persist while trying to stealth reload.

[b][u]MISC[/u][/b]
- Added sv_clantags_enabled option so custom servers can disable clan tags.
- The eggs of background players in main menu lobbies now rest in nests.[/quote]

Rumor has it:

- Size is ~525 MB (with Workshop Tools installed)