Tailor won't let me keep Think Tank

I just bought the think tank for one of my villain toons. It shows up unlocked in the costume dialog box just fine (under heads). I tried a new costume with it, and left the facemaker. Voila, I'm back in the facemaker in my old costume. So, I redid the new costume, and saved it, and tried to load it, and I get a nul costume part error.

Also tried changing just the head, with the same result...

In an amusing/frustrating note: The response to my petition was something along the lines of, check to see if you have supergroup mode turned on as that can effect the chest emblems. I would be mad, but help desk's everywhere seem to throw generic junk out in the first salvo without bothering to read the problem description, sigh.

This is a known issue. According to the Known Issues listing on the main site, apparently this costume bug has to do with Mace Mastery.

Go to a trainer. Switch to a second build. (Assuming it isn't using mace mastery. If you have one and it is, and you're an incarnate, go to your third build.)

When you go back to the tailor, you should be able to make your costume changes.

Yes, it's annoying.