Thread:Extension talk:S5SlideShow/Call to a member function getHeadItems() on a non-object/reply (3)

I'm getting the same problem on CentOS-6.4/64bit with mediawiki-1.21

httpd-2.2.15-29.el6.centos.x86_64 php-5.3.3-23.el6_4.x86_64

I have the following extensions in use

Auth_remoteuser.php   S5SlideShow/  WYSIWYG/