A member of this group called "Elmo1337" is sending fake links to people claiming you can get free Steam games.

This is 100% fake. The website asks you to login with your Steam account info. When you do, it will be sent to him and he will steal your account. So if he messages you, block and report him.

A new patch with many bug fixes has been released. It includes...

Fixed weapon switch key in the 360 controller config
XP and level are stored in the Steam Cloud
Fixed duplicate rows in the "Find Public Games" screen
Reduced screen shake when you have high ping
Fixed dedicated server always starting in LAN mode
Fixed custom item button binds not displaying properly on HUD
Fixed full network updates causing duplicate client ragdolls to spawn
Added console commands to change game access on the fly (make_game_public and make_game_friends_only)
Fixed welding icon sometimes getting stuck above player's head
Fixed HUD elements being cut off in ultra wide resolutions
Removed cheat flag from a number of cosmetic console commands
Now firing, meleeing, or reloading while welding will break you out of the weld
Fixed spectators earning achievements
Fixed infinite ammo exploit
Fixed XP exploit

If you are getting any of the following errors, then read on to find a work aorund.

"Establishing connection to games"
"Failed after 10 retries"

===== This might help =====
If you're having problems connecting to games via the normal matchmaking system, you can take these steps to get around it. It also lets you find low ping servers and avoid that bug where your camera spins like mad.

1: Open the console and type bind "F11" "openserverbrowser".
2: Close console and press F11
3: Use the server browser as you would in any other game, sort by ping/players etc

Using this, i've not had the problem with the 10 retries or establishing connection to games.