I picked this problem up when running revdep-rebuild. openmotif-2.2.3-r2 is selected for rebuilding because /usr/lib/openmotif-2.2 and /usr/X11R6/bin/uil-openmotif-2.2 require libMrm.so.3 The library is installed in /usr/lib/openmotif-2.2, but cannot be found because it is not included in /etc/ld.so.conf or LD_LIBRARY_PATH. A quick fix would to create /etc/env.d/04openmotif (change number as required) which contains: LDPATH="/usr/lib/openmotif-2.2" then running env-update to rebuild /etc/ld.so.conf
fixed in motif-config-0.3 and corresponding lesstif/openmotif versions