Index: t3lib/class.t3lib_userauth.php
===================================================================
--- t3lib/class.t3lib_userauth.php	(revision 7033)
+++ t3lib/class.t3lib_userauth.php	(working copy)
@@ -402,7 +402,7 @@
 		if (isset($_SERVER['HTTP_COOKIE'])) {
 			$cookies = t3lib_div::trimExplode(';', $_SERVER['HTTP_COOKIE']);
 			foreach ($cookies as $cookie) {
-				list ($name, $value) = split('=', $cookie);
+				list ($name, $value) = preg_split('/=/', $cookie);
 				if ($name == $cookieName) {
 					// Use the last one
 					$cookieValue = stripslashes($value);