===================================================================
RCS file: /cvs/mandoc/mandoc_char.7,v
retrieving revision 1.2
retrieving revision 1.3
diff -u -p -r1.2 -r1.3
--- mandoc/mandoc_char.7	2009/04/12 19:19:57	1.2
+++ mandoc/mandoc_char.7	2009/04/12 19:29:53	1.3
@@ -1,4 +1,4 @@
-.\" $Id: mandoc_char.7,v 1.2 2009/04/12 19:19:57 kristaps Exp $
+.\" $Id: mandoc_char.7,v 1.3 2009/04/12 19:29:53 kristaps Exp $
 .\"
 .\" Copyright (c) 2009 Kristaps Dzonsons <kristaps@openbsd.org>
 .\"
@@ -458,6 +458,19 @@ Special symbols:
 .It \e(Am
 .Pq ampersand, deprecated
 .El 
+.\" SECTION
+.Sh COMPATIBILITY
+This section documents compatibility of
+.Nm
+with older or existing versions of
+.Xr groff 1 :
+.Pp
+.Bl -tag -width 12n -offset "XXXX" -compact
+.It \e(ss
+Renders differently in
+.Fl T Ns Ar ascii
+mode.
+.El
 .\" SECTION
 .Sh SEE ALSO
 .Xr mandoc 1