Index: branches/Ver2.4/xpressme_integration_kit/include/oninstall.php
===================================================================
--- branches/Ver2.4/xpressme_integration_kit/include/oninstall.php	(revision 794)
+++ branches/Ver2.4/xpressme_integration_kit/include/oninstall.php	(revision 797)
@@ -300,13 +300,8 @@
 if( ! function_exists( 'sanitize_user_multibyte' ) ) :
 function sanitize_user_multibyte($username, $raw_username, $strict){
-	if ($username == "" && $strict){
-		if ($raw_username == ""){
-			return $username;
-		} else{
-			return sanitize_user($raw_username, false);
-		}
-	} else {
-		return $username;
-	}
+	if ($raw_username !== "" && $username !== $raw_username){
+		return $raw_username;
+	}
+	return $username;
 }
 endif;