Why do some of my items not show their gallery image in the item category or store category views, eventhough the item has an image which appears fine in the view item page? Instead of the image, a generic gray polaroid image is displayed instead.
Answer
A gallery image could not be generated successfully for any of these listings. However, it seems that for some cases the image is appearing correctly for other items using the same image.
For all these items there were download failures. For any image that is being served via a HTTP304 (a redirect), there is a larger chance of a timeout failure. The best solution will be for the seller to ensure that the picture URLs can be hit directly without being redirected.