Someone else proves that they can take even longer on something even simpler: KDE Bug 122870. In a nutshell:
Opened: 2006-03-01 00:32 Gist of fix required: accept “{“ bytecount “+}” in addition to “{“ bytecount “}” for RFC compliance. Closed: 2007-08-06 19:29
Thanks nonetheless to the KDE folks for closing this bug; fewer complaints from my DBMail users! :-)