I previously posted the same issue under ticket #2736.
www.flexiblewebdesign.com/forum-virtuemart-drop-down-shopping-cart/2736-upon-adding-item-to-cart-count-images-disappear
We have since upgraded to Joomla/VM 3 and that problem has resurfaced.
First, I have verified Joomla Backend >> VM Configuration >> Checkout and enable this option: Show product images.
Here are other things I have tried:
1. Enable plugin 'Flexible - Virtueamart 3 Dropdown Shopping Cart': That did not help, on the contrary with that plugin on, the cart does NOT refresh at all.
2. Enable plugin 'plg_system_vm2_cart', I am not even sure that's a valid plugin for VM3 but thought it would be worth a try. Same result as above.
3. Enable both plugins: The page won't even load, crashing with the below error:
stderr: PHP Fatal error: Cannot redeclare class VmImage in
/administrator/components/com_virtuemart/helpers/image.php
4. Disable both plugins: Best result so far. The cart refreshes upon adding a product to cart but the images in the cart dissapear.
The other thing I noticed is that the remove button on the cart dropdown is not working .
Any help you can provide on this will be greatly appreciated.