Index: User.php
===================================================================
--- User.php	(revision 18291)
+++ User.php	(working copy)
@@ -1616,7 +1616,7 @@
 		// to. Certain authentication plugins do NOT want to save
 		// domain passwords in a mysql database, so we should
 		// check this (incase $wgAuth->strict() is false).
-		if( strlen( $password ) < $wgMinimalPasswordLength ) {
+		if( strlen( $password ) <= $wgMinimalPasswordLength ) {
 			return false;
 		}