World Model Browser Broken?

[socktopus]

Unsure of when this started but I noticed recently that the U, H, and C keys don't work in the world model browser anymore. This occurs across multiple computers and accounts, and only in the model browser window's filter box. Just curious if anyone else has run across this and/or has found a solution to it. It's making it aggravating to filter for simple props like resupply lockers, factory hatches, etc.

Edit: Had been searching for an existing thread on this before posting it and found one almost right after I posted. Derp, sorry. http://forums.tf2maps.net/showthread.php?t=20193