There have been a number of graphics issues with this so far, but that's a new one. It might be helpful to give them a bit more information, though, so that they can replicate it and figure out what's wrong.
What kind of machine are you running on, what's your video card, what are your in-game video settings, is it just the uniform doing that or are you having other graphics issues, that kind of thing.
Using NVIDIA GeForce GTX 470 on Windows 7 64-bit. All settings maxed out on d3d9. Same bug reproduces on my laptop that has Radeon HD 6630M video card on the same OS, so I don't believe this is a hardware or driver issue.
Also, as much as I want to, I cannot change material on this uniform.
On the side note, is that Hakeev's face my character has? It seems to replace my original face whenever I modify my costume. Noticed a lot of Hakeevs running around lately too...
I believe in coincidences, coincidences happen every day. But I don't trust coincidences.
(C) Elim Garak