Via [url=http://blog.counter-strike.net/index.php/2017/11/19695/]the CS:GO blog[/url]:

[quote=Valve][ MISC ]
– Updated to latest version of SteamNetworkingSockets library to better support relayed connections.
– Fixed a regression where Aztec and Dust particle systems were failing to load in other maps.
– Updated Skill Group icons.

[ SDK ]
– Removed an unintentional dependency on Dynamic C Runtime in vvis map compiler, which should fix map compilation problems in some recent installations.
– Added de_dust2_zoo map source file for community map makers.[/quote]

Rumor has it:

- Scroll down for the updated Skill Group icons, and select Swipe or Onion Skin to scroll between two versions of them: https://github.com/SteamDatabase/GameTracking-CSGO/commit/5508e947ccb108476ac97d78a78ffd7c37f7ea71
- /u/SmokingSwishers has also [url=https://www.reddit.com/r/GlobalOffensive/comments/7edwri/counterstrike_global_offensive_update_for_112017/dq4bfgt/]put them in an imgur album for your viewing convenience[/url]

- Size is ~20 MB + ~10 MB (for the SDK)