Coda Slider CSS

Question

I am using Niall Doherty's Coda Slider on my web site but I am having trouble figuring out why some browsers like Firefox Mac/Windows and IE for Windows are rendering the thumbnail images at the bottom of the page in a vertical row instead of in a horizontal row as Safari Mac and Chrome are correctly rendering. I'm pretty sure the problem is somewhere in the CSS but I can't seem to figure it out.

The url with an example is: http://www.lazruda.com/gallery.php?page=3&cat=72157627372114619

Could someone please help? Your help is greatly appreciated.