I seem to recall both Plesk and H-Sphere supporting APC and other PHP caches. Is that not yet in PPA or did I miss that setting? What is Plesk/PPA's method for rolling out a system configuration change like the recent PHP's CGI vulnerability fix? It would mean adding to either the web server configuration for the system or each vhost, or a .htaccess file on each site. Also, the preview is using PHP 5.3.3 I think it was. Is it not updating to a recent version because it's a preview?