Man, you guys sure aren't gentle on the newbies, are 'ya?! (A disclaimer would be nice...;-) Forgot that Code was King and content not somuchso. Went back and redid it all - - sans tables and with a bumped-up DOCTYPE.
You probably still won't like the color scheme; but hey, that's taste, yes?
Things aren't lined up (eg site map and welcome boxes with the red banner).
I have no real beef with the color scheme. Reds and browns typically work very well together, but that bright cyan just doesn't seem to work. Also the dark blue text is hard to read. Try increasing the margins around the light brown boxes to get a better "buffer"...so the text in it doesn't seem so crammed.
Eliminate clutter. For example, the "program notes" section at the bottom. Is that really necessary? It doesn't seem important to me (maybe it is to your viewers...I doubt it, but I don't know for certain)...just take it out.
Have you tested your site in all browsers? I doubt it, because it looks horrible in Netscape. "Program Notes" is horizontally aligned to "site map" There is a random grey bar running across the screen, and I can't even read the text under the "site map"....its just too tiny.
If you can, make your site less image intensive (a strange paradox for an art site, I know) but it takes ages to load on dial up.
Personnally, I'd just download and install Mozilla (it behaves the same as Netscape but isn't as bloated and crappy), Opera and maybe
Safari (you'll to test that on a Mac)
According to Wikipedia the number of people using the following browsers are:
Microsoft Internet Explorer-based browsers 94.6%
Version 6 68.1% of total
Version 5.5 13.8%
Version 5 11.8%
Version 4 0.7%
Mozilla-based browers (including newer versions of Netscape) 1.8%
Opera version 7 0.8%
So it's not worth bothering with any others (that'll stir up trouble) though if your ok on the main ones you'll probably be fine with the rest.