I was working on a project for a client and downloaded a plugin that was advertised to do the exact thing I needed - but when I installed it on my development server (still running 2.2 for this client) the plugin did not work. After spending time trying to figure out what the issue was, I installed it on a generic 2.3 install of WordPress so I could reference it for the plugin author (someone I have worked with to help debug his other plugins). As soon as I installed it - I got the message “a newer version of this plugin is available” and when I installed the newer version, my problems disappeared and everything worked. The update notification is gold and worth the upgrade!

