Vertical Spacing in nroff

[utzoo!decvax!harpo!duke!ucf-cs!lantz]

     We have a problem with nroff which must  have  been  noticed
elsewhere.  When  a  multi-page paper is run off, pages after the
first  don't start at  the top of form,  and the problem  usually
gets progressively worse on each page.
     Apparently whenever vertical space which doesn't convert  to
an  integral  number  of line feeds is requested (by specific re-
quest or as sometimes is done by ms and me),  nroff supplies  the
closest number of line feeds, but assumes it has supplied the ex-
act vertical space requested.   Because  of  this,  it  adds  in-
correctly,  and doesn't supply the correct amount of space at the
end of the page.
     Has anyone come up with a solution  to  this  problem  other
than always requesting vertical space in discreet numbers of line
feeds (which does work, by the way, but also precludes the use of
ms and me)?