Mails that have a subject that are not correctly encoded are not displayed correctly, despite setting a fallback charset encoding in KMail's config. Example: I have a mail with the following subject: Subject: Eingangsbestätigung Ihrer Bestellung This is clearly invalid, as it is not RFC2047-encoded. For such cases, KMail has the option to specify a fallback encoding, which I set to ISO 8859-15. The message list does not respect that fallback encoding and displays an ugly "?" in place of the "ä". Such invalid mails are quite common.
Same bug in the messageviewer, btw. The fallback config option should be shared between those two.
SVN commit 1135591 by lfranchi: Use fallback encoding when parsing headers. BUG: 233399 M +1 -0 kmkernel.cpp WebSVN link: http://websvn.kde.org/?view=rev&revision=1135591