gLabels depends on libgnome(ui) which is deprecated and will be removed in GNOME 3 which will be released in late 2010.
Also see http://live.gnome.org/LibgnomeMustDie .
./src/glabels-batch.c:#include <libgnome/libgnome.h>
./src/mygal/color-palette.c:#include <gnome.h>
./src/glabels.c:#include <libgnome/libgnome.h>
./src/glabels.c:#include <libgnomeui/libgnomeui.h>
./src/glabels.c:#include <libgnomeui/gnome-window-icon.h>
./src/ui-commands.c:#include <libgnome/gnome-help.h>
./configure.in:libgnome-2.0 >= $LIBGNOME_REQUIRED \
./configure.in:libgnomeui-2.0 >= $LIBGNOMEUI_REQUIRED \
./configure.in:libgnomeui-2.0 >= $LIBGNOMEUI_REQUIRED \
./glabels.spec.in:BuildRequires: libgnomeui-devel >= @LIBGNOMEUI_REQUIRED@
./glabels.spec.in:Requires: libgnomeui >= @LIBGNOMEUI_REQUIRED@
Dependencies on libgnome[ui] and libglade have been removed from the development (master) branch for several months.