Comment 112 for bug 1074260

This bug has been bothering me for some weeks now. I decided to try Thunderbird (under Windows!), because of its conversation-view capabilities, and wanted it to be used by some computer-illiterates as well, but this redownloading IMAP-stuff reduces Thunderbird to a small incrowd aware of gloda and dirty cache only.

I Googled the origin of the problem: I found some very intersting comments dating from 2009 about some messages not completely downloading:

https://bugzilla.mozilla.org/show_bug.cgi?id=341225
Bug 341225 -IMAP: Thunderbird caching incomplete downloaded

https://bugzilla.mozilla.org/show_bug.cgi?id=468595 see comment 17 about the risk of a fuzz factor heuristic to fall down, which it does in our case.

This heuristic seems to be a workaround for not downloading messages completely by different threads, (inline images and attachments), while for some reason the download of a part marks the download of the rest as done.

So I guess anyone willing to fix this issue should separate these two download-statusses and kill this previous workaroud.