One of the changes Ubuntu 9.10 made from 9.04 was the placement of “asynchronous” farther down the right side of the screen.The problem a lot of users have with this is that it leaves a big space between the top of the screen and notifications.
Julien Lavergne created .deb packages (notify-osd) to fix this problem and this will restore ubuntu 9.04 behaviour
Download updated .deb packages (notify-osd)
For i386 users download from here
For amd64 users download from here
Install .deb package using the following command
sudo dpkg -i packagename