So I opened up the texture browser today and typed "tf" in the keywords box (thanks Boojum ). Immediately, Hammer locked up. I thought it might just be loading, so I didn't do anything to it. But after a minute, it showed no signs of improving, so I quit out. Then, after I re-opened Hammer, I typed in "tf" it locked up again. I can't understand why it might be. Any ideas? EDIT: Oh, and a restart didn't help.