I am using build 435 on OS X 10.5.5.
I prefer using a black background. In the process of trying to setup a color scheme to support that I have found that several of the Color settings do not stick. I am able to toggle the preferences but the changes never show up in the preview area at the bottom of the window. Neither "Apply" or "OK" buttons seems to have any affect for the problematic settings.
Go to Settings -> Editor -> Colors & Fonts -> General.
I haven't tested every preference so there may be more. The inability to change these two (at least) prevent me from effectively using a black background.