diff --git a/functions.inc.php b/functions.inc.php
index 428178da..4689e593 100644
--- a/functions.inc.php
+++ b/functions.inc.php
@@ -734,6 +734,10 @@ function check_owner ($username, $domain)
     $result = db_query ("SELECT 1 FROM $table_domain_admins WHERE username='$username' AND (domain='$domain' OR domain='ALL') AND active='1'");
     if ($result['rows'] != 1)
     {
+        if ($result['rows'] > 1) { # "ALL" + specific domain permissions. 2.3 doesn't create such entries, but they are available as leftover from older versions
+            flash_error("Permission check returned more than one result. Please go to 'edit admin' for your username and press the save "
+             . "button once to fix the database. If this doesn't help, open a bugreport.");
+        } 
         return false;
     }
     else
diff --git a/list-virtual.php b/list-virtual.php
index 2a5a7614..110cc1b8 100644
--- a/list-virtual.php
+++ b/list-virtual.php
@@ -70,6 +70,7 @@ if($fDomain) {
 
 if (count($list_domains) == 0) {
 #   die("no domains");
+   flash_error( $PALANG['invalid_parameter'] );
    header("Location: list-domain.php"); # no domains (for this admin at least) - redirect to domain list
    exit;
 }
@@ -78,6 +79,7 @@ if ((is_array ($list_domains) and sizeof ($list_domains) > 0)) if (empty ($fDoma
 
 if (!check_owner(authentication_get_username(), $fDomain)) {
 #   die($PALANG['invalid_parameter']);
+   flash_error( $PALANG['invalid_parameter'] );
    header("Location: list-domain.php"); # domain not owned by this admin
    exit(0);
 }