can't uninstall sun-jre, though, because it remains a dependency for libreoffice-fr.tcz and libreoffice.tcz.
If the dependency is due to sun-jre.tcz being listed in the dependency files, and not because libreoffice still relies
on any of the files in sun-jre.tcz, you can remove it as follows:
1. Rename the libreoffice* files to mylibreoffice*. This is so a check for updates will not try to revert the extensions back.
2. Make the same changes in the two dependency files.
3. Replace sun-jre.tcz with openjdk-6-jre.tcz in the two dependency files.
That should allow you to uninstall sun-jre.tcz. You will probably also need to unpack the two libreoffice extensions
and rename the usr/local/tce.installed/libreoffice files to usr/local/tce.installed/mylibreoffice and then repack them.