It appears some sort of glitch has cropped up affecting early downloads of NEW remotely-hosted files (i.e., files not uploaded directly through our Seller Admin), before we have a copy of the new file synced to our Amazon S3 provisions for long-term storage and delivery. Our Operations team has now been alerted and will be working to resolve the problem forthwith. Remote files which have already been successfully downloaded at least once appear to be unaffected, so meanwhile we advise sellers to refrain from updating any downloadable files on their remote servers until we followup here to confirm the issue is resolved.