Issue With 2 Column Unordered List

LINK-
http://www.elliotteyecare.com/index.100813.html

The div entitled “Featured Section” underneath the slideshow/carousel area should have two columns and it looks correct in Safari and Firefox on a Mac, but the client says that they are all floating to the left and a large white area where the second column should be. The client is using Firefox on a PC.

What gives? Can someone help me figure out why?

Thanks in advance,
Todd

I’m using FF24 on a PC and see 2 normal-looking columns. Nothing looks odd here.

Maybe they should refresh the browser a few times to make sure the new styles have loaded.