kolabd configuration fails: SSL certificate is not generated, apache unable to start

Binary package hint: kolabd

dpkg configuration (I guess it's the "bootstrap -b"-script) of Kolab fails because of missing certificate:

> kolabd (2.2.4-20100624-4ubuntu1) wird eingerichtet ...
> Lege Systembenutzer »kolab« (UID 115) an ...
> Lege neue Gruppe »kolab« (GID 124) an ...
> Lege neuen Benutzer »kolab« (UID 115) mit Gruppe »kolab« an ...
> Erstelle Home-Verzeichnis »/var/lib/kolab« nicht.
> Füge Benutzer »postfix« der Gruppe »sasl« hinzu ...
> Adding user postfix to group sasl
> Fertig.
> Füge Benutzer »cyrus« der Gruppe »kolab« hinzu ...
> Adding user cyrus to group kolab
> Fertig.
> Syntax error on line 17 of /etc/apache2/sites-enabled/kolab:
> SSLCertificateFile: file '/etc/kolab/cert.pem' does not exist or is empty
> Action 'configtest' failed.
> The Apache error log may have more information.
> ...fail!
> invoke-rc.d: initscript apache2, action "force-reload" failed.
> * Starting Kolab server kolabd [ OK ]

After that whole apache is unable to start:

> $ sudo /etc/init.d/apache2 stop
> * Stopping web server apache2
> * The apache2 configtest failed, so we are trying to kill it manually. This is
> almost certainly suboptimal, so please make sure your system is working
> as you'd expect now!
> ... waiting [ OK ]
>
> $ sudo /etc/init.d/apache2 start
> * Starting web server apache2
> Syntax error on line 17 of /etc/apache2/sites-enabled/kolab:
> SSLCertificateFile: file '/etc/kolab/cert.pem' does not exist or is empty
> Action 'start' failed.
> The Apache error log may have more information.
> [fail]

Besides: Although kolabd claims to be started it seems to not be running:
> sudo /etc/init.d/kolabd start
> * Starting Kolab server kolabd [ OK ]
>
> $ sudo ps -A | grep kolab
> $ [nothing]
>
> $ sudo /etc/init.d/kolabd stop
> * Stopping Kolab server kolabd
> start-stop-daemon: warning: failed to kill 7546: No such process
> [ OK ]

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: kolabd 2.2.4-20100624-4ubuntu1
ProcVersionSignature: Ubuntu 2.6.37-11.25-generic 2.6.37-rc7
Uname: Linux 2.6.37-11-generic x86_64
Architecture: amd64
Date: Sun Dec 26 18:38:54 2010
InstallationMedia: Kubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20101212)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: kolabd