Via [url=https://steamcommunity.com/games/CSGO/announcements/detail/529839807839339586]the Steam Community[/url]:

[quote=Valve][b][u]MAPS[/u][/b]
[b]Inferno[/b]
- Fixed roof geometry at church that was visible from boiler entrance.

[b][u]MISC[/u][/b]
- Fixed a case where voice chat would break after unloading a Steam Workshop map.
- Fixed a case where game client would crash if certain community server plugins were restricting networking of player entities.
- Fixed several bugs in applying patches UI.[/quote]

Rumor has it:

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