debconf error with kde frontend (reference to dead object ' Qt::VBoxLayout')

Binary package hint: debconf

When running apt-get (or adept - makes no difference) the installation reports the following error message:

0 aktualisiert, 1 neu installiert, 0 zu entfernen und 1 nicht aktualisiert.
Es müssen noch 0B von 22,2MB Archiven geholt werden.
Nach dem Auspacken werden 60,3MB Plattenplatz zusätzlich benutzt.
DESTROY created new reference to dead object ' Qt::VBoxLayout', <> line 1 during global destruction.
Vorkonfiguration der Pakete ...
Use of uninitialized value in join or string at /usr/share/perl5/Debconf/DbDriver/Stack.pm line 104, <GEN1> line 5.
Use of uninitialized value in join or string at /usr/share/perl5/Debconf/DbDriver/Stack.pm line 104, <GEN1> line 5.
Use of uninitialized value in join or string at /usr/share/perl5/Debconf/DbDriver/Stack.pm line 104, <GEN1> line 5.
j2re1.4 konnte nicht vorkonfiguriert werden, Exit-Status 10
Use of uninitialized value in substitution (s///) at /usr/share/perl5/Debconf/Format/822.pm line 83.
Use of uninitialized value in concatenation (.) or string at /usr/share/perl5/Debconf/Format/822.pm line 84.
Use of uninitialized value in substitution (s///) at /usr/share/perl5/Debconf/Format/822.pm line 83.
Use of uninitialized value in concatenation (.) or string at /usr/share/perl5/Debconf/Format/822.pm line 84.
Use of uninitialized value in substitution (s///) at /usr/share/perl5/Debconf/Format/822.pm line 83.
Use of uninitialized value in concatenation (.) or string at /usr/share/perl5/Debconf/Format/822.pm line 84.
Wähle vormals abgewähltes Paket j2re1.4.
(Lese Datenbank ... 112723 Dateien und Verzeichnisse sind derzeit installiert.)
Entpacke j2re1.4 (aus .../j2re1.4_1.4.2.02-1_amd64.deb) ...
Use of uninitialized value in join or string at /usr/share/perl5/Debconf/DbDriver/Stack.pm line 104, <GEN1> line 6.
Use of uninitialized value in join or string at /usr/share/perl5/Debconf/DbDriver/Stack.pm line 104, <GEN1> line 6.
Use of uninitialized value in substitution (s///) at /usr/share/perl5/Debconf/Format/822.pm line 83, <GEN6> line 2.
Use of uninitialized value in concatenation (.) or string at /usr/share/perl5/Debconf/Format/822.pm line 84, <GEN6> line 2.
Use of uninitialized value in substitution (s///) at /usr/share/perl5/Debconf/Format/822.pm line 83, <GEN6> line 2.
Use of uninitialized value in concatenation (.) or string at /usr/share/perl5/Debconf/Format/822.pm line 84, <GEN6> line 2.
Richte j2re1.4 ein (1.4.2.02-1) ...
Use of uninitialized value in join or string at /usr/share/perl5/Debconf/DbDriver/Stack.pm line 104, <GEN1> line 5.
Use of uninitialized value in join or string at /usr/share/perl5/Debconf/DbDriver/Stack.pm line 104, <GEN1> line 5.
Use of uninitialized value in join or string at /usr/share/perl5/Debconf/DbDriver/Stack.pm line 104, <GEN1> line 5.
DESTROY created new reference to dead object ' Qt::VBoxLayout' during global destruction.
dpkg: Fehler beim Bearbeiten von j2re1.4 (--configure):
 Unterprozess post-installation script gab den Fehlerwert 3 zurück
Fehler traten auf beim Bearbeiten von:
 j2re1.4
E: Sub-process /usr/bin/dpkg returned an error code (1)

(apt outputs are in german, sorry, but the importan things are the english error messages, i think)

as far as i see, in spite of this error the installation succeeds, but especially in adept it produces very ugly error messages.

installed Versions:
Ubuntu: edgy amd64
Kernel: 2.6.20.1 - amd64
debconf: 1.5.2ubuntu2
libqt-perl: 3.008-1.4
adept: 2.1.1ubuntu3

please ask for further information.