Index: t3lib/class.t3lib_div.php
===================================================================
--- t3lib/class.t3lib_div.php	(revision 6823)
+++ t3lib/class.t3lib_div.php	(working copy)
@@ -337,7 +337,18 @@
 			} else {
 				$inputGet = addslashes($inputGet);
 			}
-			$GLOBALS['HTTP_GET_VARS'][$key] = $_GET[$key] = $inputGet;
+			if (strpos($key, '|')) {
+				$pieces = explode('|', $key);
+				$tmpArr = array();
+				$tmpRef =& $tmpArr;
+				foreach ($pieces AS $piece) {
+					$tmpRef =& $tmpRef[$piece];
+				}
+				$tmpRef = $inputGet;
+				$GLOBALS['HTTP_GET_VARS'][$key] = $_GET = t3lib_div::array_merge_recursive_overrule($_GET, $tmpArr);
+			} else {
+				$GLOBALS['HTTP_GET_VARS'][$key] = $_GET[$key] = $inputGet;
+			}
 		} elseif (is_array($inputGet)) {
 			t3lib_div::addSlashesOnArray($inputGet);
 			$GLOBALS['HTTP_GET_VARS'] = $_GET = $inputGet;