[Koha] Amazon cover images on OPAC, not on staff search?

Hello all We catalogue a new title, make sure that the 10 digit ISBN is in the first of the 020 fields. Often we even copy the 10 digit number from the Amazon site. After saving and indexing (Zebra) is complete, we find that the cover image appears correctly in the OPAC, but not in the results list when searching in the staff module - there we get 'no image available'. Other titles do have covers showing. I have Googled this and not found any references to this specific issue. Can anyone shed light? Koha ver 3.00.00.107 Thank you Agnes -- Agnes Rivers-Moore Assistant Librarian Hanover Public Library