> I have just installed 11.4 and Libre Office 3.3.1 uses GTK front-end under
> 11.4. With OpenOffice.org 3.2.1 under 11.3 all was OK.

Yes, this is known to some extent.  I have been providing a patched
version of OpenOffice for Ubuntu and Debian for some time now; it might be
a good idea to get upstream support for Trinity into the stock
OpenOffice/LibreOffice sources at this point.  Any volunteers to work
through the red tape and get the Trinity integration officially supported?

Tim