[Groff] Problem with MM spacing

[Blake McBride]

Greetings,

Given MM input text:

.nr Hb 0
.nr Hs 0
.nr Hi 0
.H 1 AAAAAAAAAAAAA
.P
Now is the time for all good men to come to the aid of their party.
.H 2 BBBBBBBBBBBBB
.P
Now is the time for all good men to come to the aid of their party.


Groff produces output in which the section headers are overwritten by the
paragraph text.

In the new Heirloom, paragraph text follows naturally after the section
headers.

The text this sample was taken from was developed with groff around a year
ago.  At that time, the old groff acted like the new heirloom does now.

Which is correct?

Thanks.

Blake