And unfortunately you still have an issue with at least one product.
http://www.tylerandtallulah.com/shop...-winter-p-1265
IMHO I would use Zen's image re-sizing capabilities to re-size the images on the product_info pages to the same width. I haven't looked at all the products but most of the images appear to be similar (ish) in width and making them all, for instance, 450px wide (choose whatever width the smallest image is) would not be a problem and would make your layout issues much simpler.
Have a look at the settings in admin>>catalog>>images for the settings to do this.
If this doesn't suit you then just ignore me. It isn't any of my business really....



