Report your bugs here - if someone else has already mentioned the same bug, just add on to their post with as much info as possible to make the hunting easier.
When I was sync pocketpedia3 with Bookpedia, Pocketpedia3 couldn't get large cover. (OS is Mountain Lion) I check preferences, and try option sync, but failed.
Thank you for the info. I can't repeat it on our copy of Mountain Lion but I will continue to investigate. What happens during the cover download, does it never trigger or does it go by very fast? What about a brand new sync by removing the entire collection or Pocketpedia.