Team Fortress 2 Forum

I've been seeing this this just this morning, and no amount of steam restarts or game restarts seems to alleviate it.

I also used the steam updater, which assures me my client is up to date.

Internet is working.

Also, whenever I quit TF2 after seeing this, I see the following in console:
Using breakpad crash handler
Setting breakpad minidump AppID = 440
Forcing breakpad minidump interfaces to load
Looking up breakpad interfaces from steamclient
Calling BreakpadMiniDumpSystemInit
Looking up breakpad interfaces from steamclient
Calling BreakpadMiniDumpSystemInit

I "fixed" it by backing up my autoexec.cfg and removing ~/.cxgames/<BOTTLENAME>/drive_c/Program Files/Steam/steamapps/<STEAMNAME>/team fortress 2

I got some errors, but TF2 launched and everything seems to work again, aside from having to redownload everything.