Media Gallery Display Issue with Firefox

So I’m trying to do the finishing touches on the website before start posting on it. Most of the bugs worked out so I decide to look into the new feature WordPress brought out with the media gallery.

Using just the standard WordPress Media Gallery is fine for me when it comes to uploading the images. My issue comes after I post the images into a post.

http://www.button-smasher.com

When viewing the site in Firefox, you see the top 3 pictures, then a large white space. If you scroll down some you will see the rest of the images.

In IE this works fine, everything is in a nice block form

I’m really not concerned yet with the image.php page, I will edit that page once I get this figured out. It’s either an issue with my index.php or my css. But I’m not sure which…

Any ideas? I’ve been through these forums and anytime you try to search for gallery issues, you just pull up a bunch of stuff for the NextGen gallery, which doesn’t help me 🙁