If it's of any help, I install TDE selectively and don't have kgtk-qt3-trinity installed, I do have gtk-qt-engine-trinity. Almost all gtk stuff works fine here (except zenity radiolist) I use also xfce but find TDE (especially with Slavek's patches) preferable for everyday use and stable enough. Whatever is causing login failures, Segfault xsetroot, dcopserver... for my package setup at least there are no such problems. David