Index: typo3/sysext/cms/tslib/index_ts.php
===================================================================
--- typo3/sysext/cms/tslib/index_ts.php	(Revision 7534)
+++ typo3/sysext/cms/tslib/index_ts.php	(Arbeitskopie)
@@ -515,7 +515,7 @@
 // ***********
 $TYPO3_MISC['microtime_end'] = microtime(true);
 $TSFE->setParseTime();
-if ($TSFE->isOutputting() && ($TSFE->TYPO3_CONF_VARS['FE']['debug'] || $TSFE->config['config']['debug']))	{
+if ($TSFE->isOutputting() && (!empty($TSFE->TYPO3_CONF_VARS['FE']['debug']) || !empty($TSFE->config['config']['debug'])))	{
 	echo '
 <!-- Parsetime: '.$TSFE->scriptParseTime.' ms-->';
 }
@@ -572,7 +572,7 @@
 // *************
 // Debugging Output
 // *************
-if(is_object($error) && @is_callable(array($error,'debugOutput'))) {
+if(isset($error) && is_object($error) && @is_callable(array($error,'debugOutput'))) {
 	$error->debugOutput();
 }
 if (TYPO3_DLOG) {