Description
1) Edit Product > Images & Appearance page has overlaying components in Firefox 26 browser.
 
2) Main product image is automatically duplicated in "extra images". Now the logic is changed to duplicate image if there is at least two product images.
 
3) When you try to delete an image from Edit Product > Images & Appearance page it is not deleted and shows up again on refreshing the page.
 
Solution
1) http://www.viart.com/downloads/admin_product-4.2.html.zip
2) http://www.viart.com/downloads/block_product_details-4.2.zip
3) http://www.viart.com/downloads/admin_block_images-4.2.zip
 
 
Download the files above and extract in templates/admin folder
 in /blocks folder
 in /admin folder
 
Please do not forget to make a backup copy of the current files in case something goes wrong.