When I upgraded the first laptop to 11.10 kmail’s files needed to me migrated to the new version 4.7.2 of kmail. The migration failed, when it fails you get an error message saying that you can run “kmail-migrator –interactive” to fix this. How ever this doesn’t work. To get this to work follow the steps below:
That is it, the migration should now run and finish like planed.
Source: wiki.ubuntu.com/OneiricOcelot/Final/Kubuntu/Kmail2