As one could imagine, we are getting very specialized in handling downloads and the technical environment around that. So, what we constantly see are errors of large downloads behind proxies - especially from buyers, who are only with AOL.
A proxy in the internet world is basically a web-server, that caches the content you download and tries to minimize outgoing traffic, by delivering the content from the cache to you, rather than fetching it from the remote server. This technology is as old as the web itself and comes from the times, when traffic was incredible expensive. So you tried to keep the traffic you request as an internet service provider minimal, by caching the files locally in your own network.
That is cool - but also seems to cause some trouble for downloaders behind certain proxies. We have seen some session losses and some corrupt files in the last time of files, we know for sure, that they are alright.
One possibility to avoid broken downloads are download managers, but if the proxy between the download manager and the file to fetch delivers corrupt data, that does not help either. We will continue to solve such problems and cope with the reports we get regarding this issue.