Serghei, All, After starting over from the beginning with tqtinterface installed in /opt/qt, kdebase fails to ./configure. The config.log error is: configure:24474: result: libraries /opt/trinity/lib, headers /opt/trinity/include configure:24513: checking if UIC has KDE plugins available configure:24540: /opt/qt/bin/uic-tqt -L /opt/trinity/lib/kde3/plugins/designer -nounload -impl actest.h actest.ui > actest.cpp Qt User Interface Compiler version 4.7.1 Usage: uic [options] <uifile> -h, -help display this help and exit -v, -version display version -d, -dependencies display the dependencies -o <file> place the output into <file> -tr <func> use func() for i18n -p, -no-protection disable header protection -n, -no-implicit-includes disable generation of #include-directives for forms generated by uic3 -g <name> change generator configure:24543: $? = 0 configure:24557: result: no configure:24560: error: you need to install kdelibs first. If you did install kdelibs, then the Qt version that is picked up by this configure is not the same version you used to compile kdelibs. The Qt Plugin installed by kdelibs is *ONLY* loadable if it is the _same Qt version_, compiled with the _same compiler_ and the same Qt configuration settings. full config.log: http://www.3111skyline.com/dl/dt/trinity/errors/kdebase-config-2.log Huh? I'm not sure what I'm missing here. I look at /opt/trinity/lib/kde3/plugins/designer and all I find is: 17:36 archangel:/dat_e/david/bld/trinity/kdebase> l /opt/trinity/lib/kde3/plugins/designer total 116 drwxr-xr-x 2 root root 4096 Feb 2 16:42 . drwxr-xr-x 4 root root 4096 Feb 2 16:42 .. -rw-r--r-- 1 root root 770 Feb 2 16:22 kdewidgets.la -rwxr-xr-x 1 root root 99568 Feb 2 16:42 kdewidgets.so Anybody have an idea why kdebase is throwing this error? Is it grabbing the wrong UI Compiler? Help? -- David C. Rankin, J.D.,P.E.