Index: wiki2xml.php
===================================================================
--- wiki2xml.php	(revision 33083)
+++ wiki2xml.php	(working copy)
@@ -1449,7 +1449,8 @@
 		
 		# Remove HTML comments
 #    $this->w = str_replace ( "\n<!--" , "<!--" , $this->w ) ;
-		$this->w= preg_replace('/\n<!--(.|\s)*?-->\n/', "<!-- --> ", $this->w);
+		# Important: Do not remove leading \n, since it could be a heading delimiter
+		$this->w= preg_replace('/\n<!--(.|\s)*?-->\n/', "\n<!-- --> ", $this->w);
 		$this->w= preg_replace('/<!--(.|\s)*?-->/', '', $this->w);
 		$this->w= preg_replace('/<!--(.|\s)*$/', '', $this->w);