My thumbs are not showing up on product listing pages. There is no default image or red "x" Just an empty spot. However, when you click into a product, the thumbnail is there.
For example
http://www.carbodykits.com/Acura_Integra_Body_Kits_Carbon_Fiber_Hoods_Spoiler s_Head_Lights/?xsearch_e1=1...y+Kits+-+Front