Index: Title.php
===================================================================
--- Title.php	(revision 47682)
+++ Title.php	(working copy)
@@ -2175,6 +2175,9 @@
 		$dbkey = preg_replace( '/[ _]+/', '_', $dbkey );
 		$dbkey = trim( $dbkey, '_' );
 
+		# Clean up Arabic harakats (bug 16899)
+		$dbkey = preg_replace( '/[\x{064B}-\x{0652}]/Su', '', $dbkey );
+
 		if ( '' == $dbkey ) {
 			return false;
 		}