Upgrading to Moodle 1.7
From MoodleDocs
Moodle1.7
Before upgrading, please check the system requirements for 1.7 in Administration > Server > Environment.
If you are upgrading to 1.7 from something earlier than 1.6, then read Upgrading to Moodle 1.6.
A major new feature in Moodle 1.7 is Roles and capabilities. Roles FAQ includes several questions frequently asked by admins after site upgrades.