On my PC the middle mouse won't ping either. However on all of my kids PC's it works. I have yet to figure out what's different.

With default controls Ping, Secondary Attack and Deconstruct don't work. I remapped Secondary Attack and Deconstruct to a side button. My middle mouse however works in other games and programs.

I also noticed it calls my side button Mouse3, and the default name for middle button in the game is Mouse-3 with the dash. Probably not an issue.

If the Ping command was configurable that would help for people who's middle button won't work with this game.

Edit: I do think it's probably something weird with my mouse, but can't figure out why it works in many other programs. But not some.

Edit 2: Actually all this post except having ping reconfigurable can be ignored... Sorry. It seems my middle mouse button has finally completely died. :(