Add domain name to the list of host addresses
Objective
Temporary workaround until the following issue is fixed #245990: HTTP request testing unreliable and may be undesirable.
Note
This how-to handbook is for absolute beginners. If you consider yourself as an advanced user go to http://drupal.org/node/811406
Requirements
*Drupal 5 or 6
*Webmin 1.510
*Ubuntu 8.0.4 LTS server
*Full ROOT access. This usually doesn't work on shared hosting.
Steps
*Log-in Webmin.
*Navigate to Webmin > Networking > Network Configuration
*Click on Host Addresses
icon.
*Click on 127.0.0.1
IP address.
*In Hostnames
add your domain name at the bottom. You can add as many as you want. But only one domain name per line. Click on screenshoot to clarify.
*Click on Save
button. That's it you're done. No need to restart Webmin or your server.
*To test go to your Drupal site at admin/reports/status
. The error message should be gone.
Source: http://drupal.org/node/245990#comment-2741464
Thanks to l0xin