diff -r 2f6f6f7551ca -r 32102edaa81b web/wp-includes/pomo/po.php
--- a/web/wp-includes/pomo/po.php	Thu Sep 16 15:45:36 2010 +0000
+++ b/web/wp-includes/pomo/po.php	Mon Nov 19 18:26:13 2012 +0100
@@ -2,7 +2,7 @@
 /**
  * Class for working with PO files
  *
- * @version $Id: po.php 283 2009-09-23 16:21:51Z nbachiyski $
+ * @version $Id: po.php 589 2010-12-18 01:40:57Z nbachiyski $
  * @package pomo
  * @subpackage po
  */
@@ -19,6 +19,7 @@
 if ( !class_exists( 'PO' ) ):
 class PO extends Gettext_Translations {
 	
+	var $comments_before_headers = '';
 
 	/**
 	 * Exports headers to a PO entry
@@ -31,7 +32,11 @@
 			$header_string.= "$header: $value\n";
 		}
 		$poified = PO::poify($header_string);
-		return rtrim("msgid \"\"\nmsgstr $poified");
+		if ($this->comments_before_headers)
+			$before_headers = $this->prepend_each_line(rtrim($this->comments_before_headers)."\n", '# ');
+		else
+			$before_headers = '';
+		return rtrim("{$before_headers}msgid \"\"\nmsgstr $poified");
 	}
 
 	/**
@@ -75,6 +80,15 @@
 		if (false === $res) return false;
 		return fclose($fh);
 	}
+	
+	/**
+	 * Text to include as a comment before the start of the PO contents
+	 * 
+	 * Doesn't need to include # in the beginning of lines, these are added automatically
+	 */
+	function set_comment_before_headers( $text ) {
+		$this->comments_before_headers = $text;
+	}
 
 	/**
 	 * Formats a string in PO-style