Angus,
the Qt/Win Free people have renamed their library so that it is no longer recognized by the configure script.
Could you please extend the following line in ./config/qt.m4
for libname in -lqt3 -lqt2 -lqt -lqt-mt;
by
for libname in -lqt3 -lqt2 -lqt -lqt-mt -lqt-mt3;
Both in head and 1.3.X branch.
Thanks in advance,
Michael