Hello. Some time ago I've read in this list that KDE3 styles don't work with Qt 3.0.5 (and downgrade to 3.0.3 was recommended).
I've installed KDE from ftp://download.kde.org/pub/kde/stable/3.0.4/Debian/woody on a computer running sid (to make it work. I recompiled kdemultimedia - without that noatun used to crash arts because of libvorbisfile.so.0, and qt 3.0.5-4 - to enable xft. KDE styles do work in this install. Qt is 3.0.5-4 locally recompiled. I've installed KDE from ftp://download.kde.org/pub/kde/stable/3.0.4/Debian/sid on another computer running sid (with Qt 3.0.5-3 from sid). KDE styles don't work (only buildin Qt styles do). Strange. Seems that issue is not in Qt 3.0.5, but somewhere else.