diff --git a/modules/gallery/libraries/MY_Input.php b/modules/gallery/libraries/MY_Input.php
index 703136c70d..1d5949e870 100644
--- a/modules/gallery/libraries/MY_Input.php
+++ b/modules/gallery/libraries/MY_Input.php
@@ -26,6 +26,6 @@ class Input extends Input_Core {
    * @return  string
    */
   public function clean_input_keys($str) {
-    return preg_replace('#^[\pL0-9:_.-]++$#uD', '_', $str);
+    return preg_replace('#[^a-zA-Z0-9:_.-]+#', '_', $str);
   }
 }
diff --git a/modules/gallery/tests/Input_Library_Test.php b/modules/gallery/tests/Input_Library_Test.php
new file mode 100644
index 0000000000..0664132396
--- /dev/null
+++ b/modules/gallery/tests/Input_Library_Test.php
@@ -0,0 +1,25 @@
+<?php defined("SYSPATH") or die("No direct script access.");
+/**
+ * Gallery - a web based photo album viewer and editor
+ * Copyright (C) 2000-2010 Bharat Mediratta
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+class Input_Library_Test extends Gallery_Unit_Test_Case {
+  function clean_input_keys_test() {
+    $input = Input::instance();
+    $this->assert_same("foo_bar", $input->clean_input_keys("foo|bar"));
+  }
+}
\ No newline at end of file