Hi Snowball,
There seems to be some missing images but FF shows their alternate text in some cases.
For example the submit button for the search is actually broken being at "
http://store-0905b.mybigcommerce.com/templates/__custom/images/purple/Search.gif" FF shows Submit Query instead when an image button is broken, while Safari shows the broken image
While for RSS before the title "New & exciting" , the image points to this "http://store-0905b.mybigcommerce.com/templates/__custom/images/RSS.gif" which also is a broken link but again Safari is just showing the alt="RSS" text
Try checking the images and their url and see if they do exist or not, there seems to be nothing wrong with Safari in particular, it just acts in a different way for missing images