Thanks to all who replied. In addition to groff 1.20.1, I also had the problem with 1.19.2 (both with Slackware 12.2.)
I did not have the problem with 1.18.1 on Slackware 8.1 on an older computer, but couldn't get 1.18.1 to compile with Slackware 12.2 on this one. For now, since DEVTAG isn't mentioned in 1.18.1, I have copied the s.tmac from 1.18.1 into /usr/local/share/groff/1.20.1/tmac/sold.tmac and invoke as groff -msold and the problem disappears. Thanks again, Kurt
