Via [url=http://blog.counter-strike.net/index.php/2016/02/13639/]the CS:GO blog[/url]:

[quote=Valve][ MISC ]
– Gemini missions’ previous rating data on in-game scoreboard will now reliably refresh for the players when they replay Gemini missions.
– Improved bullet accuracy tracking algorithm to correctly account for the last kill of the match.
– Improved headshot tracking algorithm for shotguns to record a headshot if any of the pellets in the blast hit victim’s head.
– Tuned Blitz Mission schedule to better fit peak CS:GO users worldwide.
– Fixed a ladder position interpolation bug that would cause players to teleport back to the top of ladders they fell off of
– Fixed a rare player collision bug that would deal extreme falling damage to players stuck between nearly vertical level or prop geometry
– Fixed server crash when players were moving around func_tracktrains entities (fixes community server crashes when running mods Zombie Escape, Minigames, etc).
– Fixed a regression in StatTrak Music Kits official MVP counter display.
– Fixed a regression in competitive timeouts voting rules.
[MAPS]
– Cache
— Fixed various minor bugs
– Safehouse
— Fixed some trees showing as unlit
– Mikla
— Removed some decals
– Santorini
— Fixed various minor bugs
– Nuke
— Fixed pixel walking on rafters
— Fixed a number of spots where C4 could be dropped and not retrieved
— Fixed wallbanging values on trophy room wall
— Rooftop to Silo jump distance increased slightly
— Players can no longer defuse the bomb on A site from under the floor on B site
— Flashbangs now correctly blind players behind toolsblocklight brushes[/quote]

Rumor has it:

- As with past operations, Wildfire now has its own background, and Yumadapuma of reddit has a screenshot: https://www.reddit.com/r/GlobalOffensive/comments/46npdq/counterstrike_global_offensive_update_for_21916/d06j70m

- String and script changes (also some Dota 2 leftovers for whatever reason): https://github.com/SteamDatabase/GameTracking/commit/987306c2b5fd1739568f79dfd4ed85d4fc8fc81b
- Mikla's description no longer refers to Turkey specifically, as it will now say: "The alleys of a Mediterranean city serve..."

- Size is ~125 MB