Upgrading UCC to KDE 4.11
From Univention Wiki
The standard KDE release used in UCC 1.0 is 4.8.5. The Kolab packages from Kolab Systems require a more recent KDE release to use UCC as a Kolab client.
These packages are solely provided for the interoperation of UCC clients with Kolab and should not be used otherwise. If you need support services for this configuration, please contact firstname.lastname@example.org
The following lines must be integrated to a file named /etc/apt/sources.list.d/kde-411-backport.list:
deb http://ucc.software-univention.de/unmaintained/component ucc-kde411/all/ deb http://ucc.software-univention.de/unmaintained/component ucc-kde411/$(ARCH)/
Afterwards a system update must either be initiated through a software update policy (see the UCC manual) or manually on the command line:
apt-get update apt-get dist-upgrade
Alternatively the packages can be integrated into a custom image.
In case the Desktop looks distorted after the update to KDE 4.11, it can help to change the QT graphics system to 'Native' in Systemsettings -> Desktop Effects -> Advanced tab