won't display properly in certain browsers.

Hey everyone am doing my first website in two years but have hit some problems, one of my pages won't display properly in Firefox, IE and Safari. Basically the content in the right doesn't display correctly. The pictures won't go beneath the list. I think its something simple like not closing a tag but am not sure where. Also my pages have numerous errors when i try to validate to xhtml strict, there is something wrong with the headers but yet again am not sure what it is. I have attached my coding and a screenshot.

help.html

style.css

Edited February 15, 201214 yr by delboy1875