After installing motif-clients 2.3.3-5ubuntu1.12.04.1 from precise-proposed and logging out, I was able to log back in using the 'Motif Window Manager' option.
After installing motif-clients 2.3.3-5ubuntu1. 12.04.1 from precise-proposed and logging out, I was able to log back in using the 'Motif Window Manager' option.