Via [url=https://steamcommunity.com/games/CSGO/announcements/detail/508486359454843161]the Steam Community[/url]:

[quote=Valve][b][u]MAPS[/u][/b]

[b]Cache[/b]
- [b]Added Cache to Competitive, Casual, Deathmatch, and Retakes modes.[/b]

[b]Dust II[/b]
- Uncovered Mid Box (Xbox) to reveal a previously hidden jump spot. On purpose this time.

[b]Office[/b]
- Enabled collision on tarp on boxes used around CT spawn.

[b]Stronghold[/b]
- Updated to the latest version from the Community Workshop ([url=https://steamcommunity.com/sharedfiles/filedetails/changelog/3477094554]Update Notes[/url])

[b]Poseidon[/b]
- Updated to the latest version from the Community Workshop ([url=https://steamcommunity.com/sharedfiles/filedetails/changelog/3522144043]Update Notes[/url])

[b][u]ANIMGRAPH 2[/u][/b]
- Minor adjustments to viewmodel animations.
- Talon and Karambit knives are now held correctly while defusing.

[b][u]SOUND[/u][/b]
- Minor mix changes and adjustments.
- Fixed issue where C4 equip sound was not getting interrupted by other equip sounds.
- Removed first-person death sound effect that played in the case of music kit death cue being inaudible.

[b][u]MISC[/u][/b]
- Shader fix for AO while using alpha test causing overly dark and chunky silhouettes, as seen on railings in Mirage.
- Fixed a case where it was possible to hold no weapon by requesting a hand switch after throwing a grenade.[/quote]

Rumor has it:

- [b]Size is in excess of 5 GB (with Workshop Tools installed) - data capped users should take action NOW![/b]