Upgrading to 1.5 Stable
From Joomla! Documentation
Revision as of 16:52, 15 January 2008 by Chris Davenport
It is risky to upgrade a live site without testing the upgrade process first. So before upgrading the live site you need to set up a test site which is as close as possible to the configuration of your live site, then test the upgrade on that. When you are happy with the process you can apply it to the live site (having taken a fresh backup of the live site first, of course).