Safari Floats

Anyone have any trouble with floats in Safari? I’ve never had this problem before but on this project it just doesn’t work. I’ve got a container to be filled with products. The products are fed in in <li>'s and fill up the space in four columns and four rows. But instead of stacking the <li>'s all nice and neat Safari displays them all in one vertical column. Every other browser works perfectly. What could be the problem?

I’ve searched around and couldn’t find anything dealing with this problem in Safari. Any ideas are most appreciated. Thanks!