I recently installed Qt 4.7.1 on my system, and rebuilt my GEANT4 9.4 to include it.  Now, when I |source env.csh|, I get the Qt-related environment variables twice:

[...]
 On this machine the XAWFLAGS= -I/usr/X11R6/include 
 On this machine the XAWLIBS= -L/usr/X11R6/lib -lXaw 
 On this machine the QTFLAGS=-I/Library/Frameworks/QtCore.framework/Headers -I/Library/Frameworks/QtGui.framework/Headers
 On this machine the QTLIBS=-F/Library/Frameworks -framework QtCore -framework QtGui
 On this machine the QTMOC=/usr/bin/moc
 On this machine the QTFLAGS=-I/Library/Frameworks/QtCore.framework/Headers -I/Library/Frameworks/QtGui.framework/Headers -I/Library/Frameworks/QtOpenGl.framework/Headers
 On this machine the GLQTLIBS=-F/Library/Frameworks -framework QtCore -framework QtGui -framework QtOpenGL
 On this machine the QTMOC=/usr/bin/moc
[...]

Notice that QTFLAGS and QTMOC are both reported twice, along with the pair of QTLIBS and GLQTLIBS.  This is a very minor issue, but I thought I'd throw it into the queue.