Karmic’s Notification Changes
Ubuntu’s notification system will see several improvements and changes for it’s inclusion in Karmic.
The most notable and obvious of these is will be its appearance. The large rectangular pop-up’s of Jaunty are replaced with a sleeker smaller bubble.
Hovering or edging your mouse closer to a pop-up results in a new “blurry” effect (if you’re using compositing).
Like so; as i edge my mouse towards the pop-up, it blurs and fades: -