diff -urpN mhonarc-2.6.16-1.orig/lib/mhtxthtml.pl mhonarc-2.6.16-1/lib/mhtxthtml.pl
--- mhonarc-2.6.16-1.orig/lib/mhtxthtml.pl	2005-05-01 19:04:39.000000000 -0500
+++ mhonarc-2.6.16-1/lib/mhtxthtml.pl	2010-12-21 21:09:52.000000000 -0600
@@ -125,6 +125,7 @@ sub filter {
     }
 
     local(@files) = ();	# XXX: Used by resolve_cid!!!
+    my $orig_data = $$data;
     my $base 	 = '';
     my $title	 = '';
     my $noscript = 1;
@@ -352,6 +353,10 @@ sub filter {
     ## <http://www.google.com/googleblog/2005/01/preventing-comment-spam.html>
     $$data =~ s/(<a\b)/$1 rel="nofollow"/gi;
 
+    if ($$data ne $orig_data) {
+	undef $orig_data;
+	return filter(@_);
+    }
     ($title.$$data, @files);
 }