Make a message pop up when trying to upload an image when no SKU exists.
when you have image lookup check in the admin and then go to a product and try to upload an image it will not allow you too. That is good but a message should pop up that saying you have image lookup checked and you cannot upload an image with out a sku in the product. I had a client spend 2 days trying to figure out why it worked sometimes and not others. THANKS!