I figured the "open color picker" thing would probably not work in Mac. Don't worry, you're not missing much.
But do those color sliders work at all? (I'm assuming they show up... click on the screenshot below... does Mac interface look like this?)
http://www.rubberslug.com/colorpicker.jpg
If those sliders don't show up, I may have to offer Mac people another way of changing the colors. Doing it by typing in numbers is very anti-fun, and we're all about fun here.
The version number helps a lot, though, thanks. IE 5 on Mac still tends to be a little buggy, don't know about 5.1. At least it isn't Netscape. That one idiotic piece of software is just flat-out broken. I hear 6+ is actually decent, but I need to keep 4.7 installed because of how horrible it is.
I guess the next question is, does anyone have a cheap/near-dead mac for sale I could use to test this site on? =)