Fun theme - can't change header background color

I was able to set the background color the main blog's header - no issues. Got to work on a sub-blog and noticed that I couldn't get the color to change. Went back to the main blog and tried to tweak the background color from black to something else...no dice. Resetting the options doesn't make a difference. I haven't gotten too deep into testing other customization options, but those I have tested are okay.