WooCommerce/Wootique issue

Notwithstanding the content of the site I am managing for my friend’s small business, I’m having some issues.

Pages like this one:

http://www.hdglassart.com/product-category/handpipes/spoons/

and any with 3 or more products will have the one furthest to the right changing its width a few pixels on hover… none of the other products on the page do that, and it’s not the image file itself because i’ve changed the order of products and no matter what product is in that spot, it will do it.

ideas?