Other things are moving on the page too. Take this simple test case.
.\" groff -t -ma4 -mm simple.tr >simple.ps .\" .DS foo .DE .DS bar .DE
The location of `bar' is vertically lower with 1.18 compared to 1.17.2.
Again, from the differences in the definition of DS, it looks like unit changes for header and footer margins may be the cause.
Other things are moving on the page too. Take this simple test case.
.\" groff -t -ma4 -mm simple.tr >simple.ps
.\"
.DS
foo
.DE
.DS
bar
.DE
The location of `bar' is vertically lower with 1.18 compared to 1.17.2.
Again, from the differences in the definition of DS, it looks like unit
changes for header and footer margins may be the cause.