diff --git a/path_alias_xt.module b/path_alias_xt.module
--- a/path_alias_xt.module
+++ b/path_alias_xt.module
@@ -89,7 +89,13 @@ function path_alias_xt_url_inbound_alter(&$path, $original_path, $path_language)
   if (!empty($original_path) && $path == $original_path) {
     // drupal_get_normal_path() did not find a system path
     $candidate_alias = $original_path;
-    while ($pos = strrpos($candidate_alias, '/')) {
+    // This needs to use explode() and not strrpos() / drupal_substr(), because
+    // strrpos() is not unicode safe, so unicode characters can lead to an
+    // endless loop.
+    $parts = explode('/', $candidate_alias);
+    $path_suffix = array();
+
+    while (count($parts) > 0) {
       // If the truncated path exists as a menu item (incl. paged views), abort.
       // E.g.: we won't replace and extend the user alias 'admin' in this path:
       // admin/structure/block/manage/system/navigation/configure, because
@@ -97,7 +103,8 @@ function path_alias_xt_url_inbound_alter(&$path, $original_path, $path_language)
       if ($menu_item_path = _path_alias_xt_get_menu_item($candidate_alias)) {
         return;
       }
-      $candidate_alias = drupal_substr($candidate_alias, 0, $pos);
+      array_unshift($path_suffix, array_pop($parts));
+      $candidate_alias = implode('/', $parts);
       if ($src = drupal_lookup_path('source', $candidate_alias, $path_language)) {
         // If 'user' is aliased to MyAccount, then MyAccount/edit needs to
         // transform to 'user/123/edit'.
@@ -105,7 +112,7 @@ function path_alias_xt_url_inbound_alter(&$path, $original_path, $path_language)
           global $user;
           $src .= '/' . $user->uid;
         }
-        $path = $src . drupal_substr($original_path, $pos);
+        $path = $src . implode('/', $path_suffix);
         return;
       }
     }