Odd experiment: Install libqt2.2 2.2.4 from deb, now QTDIR is /usr/share/qt... All's well, now try running an application that was compiled against libqt2.2 while QTDIR was /usr/lib/qt2 ...
I haven't tried too many yet, but.. kde has some odd problems. Lots of messages scroll on the console where it wants to fine /usr/lib/qt2/qlistview.h and konqueror looks rather odd. Some of the menu buttons across the top are duplicated, the fonts are horrible and cannot be changed with configure->konqueror->appearance. Maybe libqt2.2 2.2.4 should conflict with all the kapps compiled with libqt2.2 << 2.2.4? Just a thought/observance from here. Gordon Sadler