Under each item, where it shows you "people who bought this item also bought" it was just an ugly missing photo.
So, with a quick fix to the display.functions.php file, thanks to Ken, it's looking like this:
And with a quick bit of prettifying, it's good to go!
So if you're having the same problem, check out the solution over at ken.ph, being sure to check/know which version of WP e-commerce you're using.