Comment 1 for bug 876936

sudo apt-get install qdbus solved the problem, but this should not be necessary in the beginning:

tg@andromeda ~$ sudo apt-get install qdbus
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  libxklavier12 libboost-program-options1.34.1 libopenexr-dev libaspell-dev libenchant-dev libjasper-dev libilmbase-dev libacl1-dev libpoppler3 libkeyutils-dev libattr1-dev libmozjs0d libical-dev libsasl2-dev libbz2-dev
Use 'apt-get autoremove' to remove them.
The following packages will be REMOVED:
  qdbus:i386
The following NEW packages will be installed:
  qdbus
0 upgraded, 1 newly installed, 1 to remove and 1 not upgraded.
Need to get 27.8 kB of archives.
After this operation, 4,096 B of additional disk space will be used.
Do you want to continue [Y/n]?
Get:1 http://de.archive.ubuntu.com/ubuntu/ oneiric/main qdbus amd64 4:4.7.4-0ubuntu8 [27.8 kB]
Fetched 27.8 kB in 0s (167 kB/s)
dpkg: qdbus:i386: dependency problems, but removing anyway as you requested:
 libqt4-dbus:i386 depends on qdbus.
 libqt4-dbus depends on qdbus; however:
  Package qdbus is not installed.
  Package qdbus:i386 is to be removed.
(Reading database ... 508884 files and directories currently installed.)
Removing qdbus:i386 ...
Processing triggers for man-db ...
Selecting previously deselected package qdbus.
(Reading database ... 508885 files and directories currently installed.)
Unpacking qdbus (from .../qdbus_4%3a4.7.4-0ubuntu8_amd64.deb) ...
Processing triggers for man-db ...
Setting up qdbus (4:4.7.4-0ubuntu8) ...