Problem with attributes set with Display Only

[canemasters]

I re-uploaded the entire contents of includes, and the admin folder from a fresh install just to verify nothing went wrong during the file transfer, but it's still doing it.

I'm just not getting any error that I missed a required attribute. It's going right to "your shopping cart is empty".



For an example of one of my sites with the attribute error that works, look here:
http://www.canemasters.com/index.php?main_page=product_info&cPath=1_3&products_id=298

Now, on my other site, it doesn't work. Look here:
http://www.hardwoodcanes.com/birds-h...-cane-p-4.html

I don't get it. I compared attribute settings between the two sites, and they both match.
Both sites are running 1.5.0