I re-installed and the "Successful install" page gives me this warning:
Warning! Wildcard DNS may not be configured correctly!
To use the subdomain feature of WordPress MU you must have a wildcard entry in your dns. The installer attempted to contact a random hostname (6638d2.auexaminer.com) on your domain but failed. It returned this error message:
Couldn't resolve host '6638d2.auexaminer.com'
From the README.txt:
If you want to host blogs of the form http://blog.domain.tld/ where domain.tld is the domain name of your machine then you must add a wildcard record to your DNS records.
This usually means adding a '*' hostname record pointing at your webserver in your DNS configuration tool. Matt has a more detailed explanation on his blog. If you still have problems, these forum messages may help.
You can still use your site but any subdomain you create may not be accessible. This check is not foolproof so ignore if you know your dns is correct.
Directory Permissions
Please remember to reset the permissions on the following directories:
* /home/auexami1/public_html
* /home/auexami1/public_html/wp-content/
You can probably use the following command to fix the permissions but check with your host if it doubt:
chmod 755 /home/auexami1/public_html /home/auexami1/public_html/wp-content/