The UseCanonicalName [httpd.apache.org] directive is only available in server config, virtual host, and directory containers, not in .htaccess. You'll have to ask your host to turn it off, to correct your canonical server name, or both.
Jim
wanderingmind
5:23 am on Jul 13, 2007 (gmt 0)
Thanks for the clarification, jdMorgan.. just did that :)