Index: typo3/sysext/cms/tslib/class.tslib_fe.php
===================================================================
--- typo3/sysext/cms/tslib/class.tslib_fe.php	(revision 8748)
+++ typo3/sysext/cms/tslib/class.tslib_fe.php	(working copy)
@@ -3412,7 +3412,9 @@
 
 			// Set headers, if any
 		if (!empty($this->config['config']['additionalHeaders'])) {
-			$headerArray = explode('|', $this->config['config']['additionalHeaders']);
+			$this->newCObj();
+			$additionalHeaders = $this->cObj->stdWrap($this->config['config']['additionalHeaders'], $this->config['config']['additionalHeaders.']);
+			$headerArray = explode('|', $additionalHeaders);
 			foreach ($headerArray as $headLine) {
 				$headLine = trim($headLine);
 				header($headLine);