I have three 375 tailors on my account (two shadoweave, one spellfire). Two of the three are normal; the third (one of the two shadoweave tailors) only displays roughly a third of the recipes he knows, and they're in a scrambled order. I disabled any addon I could think of that might affect tradeskill UIs, but the problem persists - again, only on the one character; the other two have a complete and well-ordered list of recipes.

Any idea what could be happening here?

This is a total shot in the dark, but if you have MoveAnything, disable or upgrade it. Anything but the latest version screws up your UI in REALLY weird ways post-2.1.

Yeah, nice suggestion, but I don't use Move Anything. It may just be a matter of disabling everything and adding them back in one at a time until it doesn't work again as is typical for post-patch angst, but I was just checking to see if anyone else had this happen to them, and blindly hoping for a quick fix.

This happened to me after the last mini-patch. I believe renaming the cache folder fixed it, so you might try that. I also thought it was a tradeskill addon thing, but I'm 99% sure I fixed it without messing with addons.

I was hunting around last night, but couldn't figure out which cache file held that information. Do you remember which one you renamed?

No, I renamed the entire cache and WTF folders, I think, exited game, came back in, then named the folders back to what they were and it was fixed. I think. Can't quite remember... sorry.