I have a Moodle 2.3 test site ( version: Moodle 2.3dev (Build: 20120601) ) but after a go to notifications and 'click for available updates' I get the following ..........
Your Moodle code is up-to-date!
Last check done on 17 June 2012, 11:33 PM
Moodle 2.3dev (Build: 20120601)
Copyright © 1999 onwards, Martin Dougiamas
and many other contributors.
GNU Public License
It's the sane version, even though I checked the latest version on the Moodle download as: $version = 2012061500.00;
It appears as though clicking on update doesn't do anything.
Am I doing something wrong?