I'll have a go at using a sub-domain.
I'm looking in the default php.ini file at output_buffer as it was setup by ISPConfig. It has a value of 4096. Joomla is asking that I turn it off.
What do you recommend I do?
My VPS system:
(Ubuntu 10.04 LTS, Kernel 3.4.2-linode44, Apache 2.2.14, MySQL 5.1.63, PHP 5.3.2, ISPConfig 18.104.22.168, Webmin, PureFTP & Quota, phpMyAdmin, postfix, dovecot, clamav, spamassassin, awstats, fail2ban, Jailkit, bind9, vlogger, webalizer)