#146 "Unknown Sender" with message/rfc822 messages

[Thijs Kinkhorst]

If you receive a mail with another message attached (e.g. forward as attachment), and you open it, the list of attachments says "Unknown Sender" When you open that attachment the mail displays fine, and, when revisiting that mail in the same session also displays the correct sender.

Appearently the system depends on some kind of cached value that is not initialised when not found? I couldn't find an immediate cause so filing it here.