Index: typo3/sysext/cms/tslib/class.tslib_fe.php
===================================================================
--- typo3/sysext/cms/tslib/class.tslib_fe.php	(revision 4631)
+++ typo3/sysext/cms/tslib/class.tslib_fe.php	(working copy)
@@ -2112,6 +2112,17 @@
 			// No cache
 		if ($this->config['config']['no_cache'])	{ $this->set_no_cache(); }		// Set $this->no_cache true if the config.no_cache value is set!
 
+			// merge GET with _DEFAULT_GET_VARS
+		if (is_array($this->config['config']['_DEFAULT_GET_VARS.'])) {
+			$getVars = t3lib_div::_GET();
+			foreach ($this->config['config']['_DEFAULT_GET_VARS.'] as $key => $value) {
+				if (!isset($getVars[$key])) {
+						$getVars[$key] = $value;
+				}
+			}
+				// Write values back to $_GET:
+			t3lib_div::_GETset($getVars);
+		}
 
 			// Hook for postProcessing the configuration array
 		if (is_array($this->TYPO3_CONF_VARS['SC_OPTIONS']['tslib/class.tslib_fe.php']['configArrayPostProc'])) {