On a fresh Kubuntu 12.10 install, all I did was a default upgrade to KDE 4.9.3. Then, rightaway on the first start of Kmail, it crashes with the following error: "The Email program encountered a fatal error and will terminate now. The error was: Keine Ressourcen-ID angegeben." Last sentence in English should be something like "No ressource ID given". From the second start it worked fine. Reproducible: Didn't try Steps to Reproduce: Probably only reproduceable on fresh installs.
The problem persists in Kubuntu 13.04 Beta 2 with Kontact 4.10.1.
This bug has only been reported for versions before 4.14, which have been unsupported for at least two years now. Can anyone tell if this bug still present? If noone confirms this bug for a Framework-based version of kmail2 (version 5.0 or later, as part of KDE Applications 15.12 or later), it gets closed in about three months.
Just as announced in my last comment, I close this bug. If you encounter it again in a recent version (at least 5.0 aka 15.08), please open a new one unless it already exists. Thank you for all your input.