Logged on today to notice that my body was invisible. I brought a friend online and he confirmed that it was on my end. This only happens with my new mighty cobalt armor. I suspect that I may have logged off a bit too fast after I made it.
Mighty cobalt armor; no costume
http://gyazo.com/5931709ed6e946900c073fd69e937f70.png
With costume
http://gyazo.com/56cd9f907e0bbfe5f8d21cf428c12615.png
As a side note, I know that it isn't huge as it can easily be fixed with a costume, but I do prefer the cobalt armor to the starting armor.
Make sure your video drivers are up to date. Also, try toggling compatibility mode.
This is not a bug, but a software/hardware incompatibility user side.