Ran the Plesk updater today on an RH9 box with 7.5.4. Since then, all MovableType 2.6x installations return 500 errors on mt.cgi. From the domains' error_log: And from /var/log/httpd/suexec.log: Added 10 hours later: Additionally, FrontPage users are unable to publish. From a domain's error_log: And from /var/log/httpd/suexec.log: Out of my depth here. Any hints on how to fix this?