A couple of months ago I deployed Joomla 1.6 and I am now having to upgrade to 1.7. This latest version doesn't come with major changes from an admin perspective.
After August 2011 Joomla! will not be releasing security updates for Joomla 1.6. It is thus recommended to upgrade to 1.7. This is the last of the short cycle releases until Joomla 1.8 scheduled for January 2012 reaches. The latter is planned to run for 15 months.
Anyway life was made easy with the one-click upgrade button. Here's a quick step-by-step guide.
1. Open your Joomla! Backend administration page.
2. Go to Extensions --> Extension Manager
3.Click on 'Purge Cache' button (located in upper right corner)
4.After that click on 'Find Updates' button next to 'Purge Cache'
5.Select the Joomla check-box in the results list and click on 'Update'
6. Notice the new version of your Joomla! installation after successful update.
Am happy that my templates and add-ons still work properly for now. A mail just popped in saying that CB is now 1.7 native. Great!