I just found a issue similar to the GTC missing picture error. Like with the GTC missing picture error when you look at the listings on your selling page or seller hub the thumb nail for the listing is there. However if you go into the listing and edit it there is a error on the 1st picture. IT says the file is corrupted and needs to be replaced. So far I have almost checked all of the 1st 200 of my 631 listings and found 2 listings that had this issue. For both I removed all images and uploaded them so that I can be assured there is no issue with the other images.
I would suggest that other sellers may want to go through each of their listings no matter how many they have to make sure their listings have all of the pictures needed to sell their item especially since this so far has been with the very first image on the listing.
I replaced the images but did not think to take a screen shot till after I replaced the images on the 2nd listing. If I find any more I will try to remember to take the screen shot but still I would suggest checking your listings as if there were 2 there is bound to be more.
