>> nsd-xfer(8) contains this code:
>>
>> .SH "OPTIONS"
>> .LP
>> .TP
>> .B \-4
>> Only send to IPv4 addresses.
>>
>> In groff and old mandoc, there is no blank line after OPTIONS,
>> now there is one.
>
> Ouch, this is indeed a bug: the syntax tree appears to be messed up by
> the removal of the `LP'. I'll look into it...

Ingo,

Please check if the enclosed patch fixes this problem without fallout. 
Basically, the "next node append type" for -man was automatically being 
set to NEXT, clobbering the value set during node deletion in the 
post-validator.  This was causing the `LP' to be removed and the next 
node, the `TP', being assigned under the block of `SH'.  Ew.  I 
eye-balled it over a selection of -man and ran it over my regular tests 
for failure.  This is quite an old bug, it turns out.

Thanks,

Kristaps