--- a/mercurial/help/subrepos.txt	Wed Nov 09 19:46:49 2011 -0500
+++ b/mercurial/help/subrepos.txt	Wed Nov 09 19:46:51 2011 -0500
@@ -95,6 +95,9 @@
     elements. Git and Subversion subrepositories are currently
     silently ignored.
 
+:forget: forget currently only handles exact file matches in subrepos.
+    Git and Subversion subrepositories are currently silently ignored.
+
 :incoming: incoming does not recurse in subrepos unless -S/--subrepos
     is specified. Git and Subversion subrepositories are currently
     silently ignored.