I have always assumed that any problems loading pictures were caused by my less than adequate internet connection. But lately there seem to be more and more of them, and sometimes the picture shows up and then goes away. In my purchased items list right now, there is a seller with 8 items. When I bought them the listing pictures loaded fine. Now they are all blank, but when I click into each listing the photos are there.
I agree, something glitchy is going on. Sorry I can't help you fix it.
