Thanks, Tadziu! I've attached your patch to http://savannah.gnu.org/bugs/?57034.
Andreas and Robert, are the other issues you noted in this thread manifestations of the same problem, or separate problems? I'm not at all an mm user so don't know the expected behavior, but from the descriptions, it sounds like at least the .LT problem Robert reported is something different. Would you two mind opening new bugs in our bug tracker (http://savannah.gnu.org/bugs/?group=groff&func=additem) to document these problems if they're different from 57034? You can submit bug reports here without creating an account.
