diff --git a/library/Icinga/Application/Config.php b/library/Icinga/Application/Config.php
index 22757d5f9..251ed4fb6 100644
--- a/library/Icinga/Application/Config.php
+++ b/library/Icinga/Application/Config.php
@@ -472,11 +472,17 @@ class Config implements Countable, Iterator, Selectable
             $filename = $type . 's.ini';
         }
 
-        return static::resolvePath(
-            ($username ? 'preferences' . DIRECTORY_SEPARATOR . $username : 'navigation')
-            . DIRECTORY_SEPARATOR
-            . $filename
-        );
+        if ($username) {
+            $path = static::resolvePath(implode(DIRECTORY_SEPARATOR, array('preferences', $username, $filename)));
+            if (realpath($path) === false) {
+                $path = static::resolvePath(implode(DIRECTORY_SEPARATOR, array(
+                    'preferences', strtolower($username), $filename
+                )));
+            }
+        } else {
+            $path = static::resolvePath('navigation' . DIRECTORY_SEPARATOR . $filename);
+        }
+        return $path;
     }
 
     /**