Yeah, I deleted the random brushstroke set because Iiiiiiiiiiii am a dork and saved the files wrong. Turns out there was only one brush in a set that should have had seven. Usually I double check things to make sure it's all set and ready to go, but for some reason, that one slipped by me.
Oops.
Just means I have to dig up my .psd files that I burned last weekend and remake the set, so until I get the motivation to do just that, I took it down. Sorry!