Little bugreport:

If you try to post art and forget to choose a category. (2d, 3d, texture, etc.). The site highlights that field with an info that you need to choose one.

But the highlight is a red border with white background and the font is white too. So its white font on white background.

Firefox 11.0 at WinXP

Just noticed another thing, if you click on preview posting in this forum I get a preview with a white background. Clicking on preview in the submit art section makes a black background.