Trying to install Trinity packages under Lubuntu 12.04

Hello, After installing Lubuntu 12.04 from a USB drive on an i386 machine, I updated everything, enabled the four Trinity repositories in Synaptic, then tried to mark a package for installation.  An "unresolvable dependencies" error message like this appeared:   kpdf-trinity:     Depends: kdelibs4c2a-trinity but it is not going to be installed Perhaps it's because my Lubuntu version is "precise", while the latest Trinity repositories version is "oneiric".  If so, I wonder what to do. Maybe I need to be running Lubuntu Oneiric when installing Trinity packages? PS. I like to use Lubuntu as the base system since wireless networking works well that way - have had connection trouble when using KDE/Trinity wireless networking.  Otherwise, I really like Trinity Krusader, Amarok, etc.