2 column fixed with with background image

So this site looks great on the browsers I have (updated Mac OS X browsers) but I'm sure it looks off on others. Can you guys/gals take a look at it and let me know if I am on the right track and what hacks need to be implemented to make it work...

http://www.suspendedmoment.com/new/test.html

http://www.suspendedmoment.com/new/main.css

or without margins and using padding instead

http://www.suspendedmoment.com/new/test_02.html

http://www.suspendedmoment.com/new/main_2.css

Thanks!