[Help Wordpress] Broken thumbnails scrolling

i'm getting the same errors at the user in this closed post: http://help.dimsemenov.com/discussions/problems/1920-thumbnail-unab...

when you say "update it" what exactly do you mean?

Here is a link to what my thumbnails are doing:
http://bradleybayou.com/test/

any help would be greatly appreciated!

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help.dimsemenov.com