tried installing qt4.i386 on a x86_64 box today: ... Transaction Check Error: file /usr/include/Qt/qconfig.h from install of qt4-devel-4.3.0-8.fc7 conflicts with file from package qt4-devel-4.3.0-8.fc7 file /usr/include/QtCore/qconfig.h from install of qt4-devel-4.3.0-8.fc7 conflicts with file from package qt4-devel-4.3.0-8.fc7 doh. Fix is easy enough.
%changelog * Sun Jul 15 2007 Rex Dieter <rdieter[AT]fedoraproject.org> 4.3.0-9 - multilib broken: qconfig.h (#248768) - +%%_qt4_demosdir,%%_qt4_examplesdir - + Qt.pc, provide pkgconfig access to qt4 macros/variables
To be clear, this affects qt4-devel only, not qt4 runtime.
qt4-4.3.0-9.fc7.1 has been pushed to the Fedora 7 stable repository. If problems still persist, please make note of it in this bug report.