diff --git a/plugins/acl/acl.php b/plugins/acl/acl.php
index 1952dad49..e69fa6a1e 100644
--- a/plugins/acl/acl.php
+++ b/plugins/acl/acl.php
@@ -441,7 +441,7 @@ class acl extends rcube_plugin
             if (!empty($this->specials) && in_array($user, $this->specials)) {
                 $username = $this->gettext($user);
             }
-            else {
+            else if (!empty($user)) {
                 if (!strpos($user, '@') && ($realm = $this->get_realm())) {
                     $user .= '@' . rcube_idn_to_ascii(preg_replace('/^@/', '', $realm));
                 }
diff --git a/plugins/acl/package.xml b/plugins/acl/package.xml
index e5d411e18..578ab6138 100644
--- a/plugins/acl/package.xml
+++ b/plugins/acl/package.xml
@@ -13,9 +13,9 @@
 		<email>alec@alec.pl</email>
 		<active>yes</active>
 	</lead>
-	<date>2012-06-28</date>
+	<date>2013-01-29</date>
 	<version>
-		<release>1.0</release>
+		<release>1.1</release>
 		<api>0.7</api>
 	</version>
 	<stability>