I tried to purge the existent libreoffice and openoffice(?) files by entering
sudo apt-get purge 'openoffice*'
and
sudo apt-get purge 'libreoffice*'
in a terminal.
In Synaptic I added the packet source
ppa:libreoffice/ppa
to be sure to receive the latest version of the libreoffice packet.
I tried to purge the existent libreoffice and openoffice(?) files by entering
sudo apt-get purge 'openoffice*'
and
sudo apt-get purge 'libreoffice*'
in a terminal.
In Synaptic I added the packet source
ppa:libreoffice/ppa
to be sure to receive the latest version of the libreoffice packet.
After the whole procedure the bug is still there.