Virtuemart Version : 3.0.12
Joomla : 3.4
PHP : 5.4.43
i have a problem with thumbnail image in all administration area ( products and categories )
only the first photo shown only there is attached photo show the problem
there is no problem in front end
i tried several method to solve this but failed in all
I think we solved that for vm3.0.14, please read our news
http://virtuemart.net/news/latest-news/476-virtuemart-releases-vm3-0-14-and-announces-a-new-collaboration-with-2checkout-to-provide-seamless-international-payments-for-online-retailers