I would delete javascript code for disabling right-click and text selection.
First: it doesn't work in Opera.
Second: It's easy to hack
Third: It's veeery annoying
Two things stood out at me. First, I think the green menu bar is a little too dark for use with the black letters - it was hard for me to read at first.
Second, as in FireFox, the site renders poorly in Safari. I agree with the previous poster that using a validator like validator.w3.org would really help.