Lets try it...
http://validator.w3.org/check?uri=www.samuelandsons.com
Oops, looks like you have work to do. Just because it works on some browsers doesn't mean it's valid.
Bob
ok. so i have been working on a website for some time now and I have been using a mac to develop it. Everything looks fine on all browsers.... except internet explorer!!!!!!! The site is www.samuelandsons.com and if you go on with internet explorer from a windows machined simply click skip for the intro. Now you are at main.html; Why are all the tables off? I cannot figure this out and it has been plaguing me for days!
The only page that comes in clearly aligned is showrooms!
Anyone out there willing to help!!! If you can please help me!
-ms

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic