[opensuse-factory] KDE PIM problem (kmail)

Hello experts, since the latest update I'm no longer able to configure IMAP resources in kmail. If I want to add a new IMAP mail account in kmail, it gets added, but the configuration dialog does not open. If I select an existing IMAP account and click on "Change" nothing happens. Starting kontact from a console I get a error Message once I open the kmail config dialog saying that a plugin library can not be loaded. Any ideas what went wrong? Regards, Jörn