It was a glitch with the gallery. Same glitch as the previous week and seems to keep happening.
When l spoke to eBay tech support, they talked me through a 'work around' that will get your gallery images showing.
Of course, you can wait until they fix the issue each time it happens but if waiting isn't your thing, try this:
Go to the Site Map link at the bottom of any page.
Look at Selling Activities heading, then 'change my gallery picture'.
Enter the item number you have that has the dodgy photo.
A new screen opens, showing what your gallery image should be.
Click on your gallery photo on that page, then click Change.
You don't have to upload anything or re-do the photos. They are there, just broken.
Click Okay and then you can enter another item number and do the same.
It took about 2 minutes to fix 20 something listings.
Have your Selling page open in the background and just flick between screens to get each item number (cut/paste).
Hope that helps and that l haven't confused you.
