This tutorial shows you how to create a custom 404 error page within your Mambo or Joomla 1.0 web site and set it up as the default 404 page for your web site. Using the methods described here you can not only create a useful 404 page for your site visitors but it will also send the correct headers.

This tutorial discusses the most common causes of duplicate content and provides tips on how to avoid them. These tips apply to all web sites, not just sites developed with Mambo. We look at on-site duplication, issues with providing feeds, the value of using affiliate content, and more…

In this tutorial we look at some of the common causes of duplicate content within Mambo and tell you how to prevent search engines from indexing your Mambo-generated PDF's and potentially giving them a higher page rank than the content itself.

Mambo provides "SEF" URL's that you can enable through global configuration. This tutorial explores the advantages and disadvantages of using the in-built SEF option, and how to use it. We take you step-by-step through setting up SEF URL's.

Mambo 4.6.4 has been released and all Mambo users are urged to upgrade their sites as soon as possible. This release fixes some serious security issues that exist in previous versions of Mambo.

My guide to .htaccess has been very popular on both the Mambo and Joomla! forums. Due to popular demand, I am reprinting it here for you.
.htaccess files are "distributed configuration files" and provide a way to make configuration changes on a per-directory basis. What you can put in .htaccess files is determined by the AllowOverride [...]