Hi! Hope i"m putting this in the right place, if not sorry

I use IE7 with Windows XP and my site looks fine to me, looks fine in a lot of other browsers too, but in some it just totally TUH-WEEKS! I can't figure out how to fix it and I've been working on it for three days!!! GRrRRR!

here's a link to screenshots from various browsers including ones that look good and ones that look stupid...
http://browsershots.org/http://segarfamily....com/index.html

I did an html validate. I got a couple warnings about my javascripts, but I didn't write them so I don't know how to fix them.

I did a css file validation and received LOADS of warnings, but I am obviously crap with css, and I don't know how to fix them either.

Any help would be appreciated. Thank you much.

my site is http://segarfamilyfloors.50webs.com
my css file is http://segarfamilyfloors.50webs.com/style.css

Wow 40 views and not one helpful suggestion?

So which views do you think "look stupid"? And what specifically do you think makes them "look stupid"?

The one that looked the worst to me (just looking at the thumbnails) was "Firefox 2.0.0.18
Mac OS X 10.5". When I view it in that configuration, I don't see anything wrong.