Problem with horizontal scrolling
 

I love this theme but am having some trouble with the layout. The web will be viewed by someone using 800x600 resolution (i know:<)

My problem when using this resolution on a monitor the horizontal scrolls are missing. I assume somewhere there is an overflow:hidden but I can't find it. I have some custom css that has an overflow statement but even removing this does not work.
www.silverridgehomes.com

all help is appreciated