Ubuntu's new notification framework (Notify OSD) is not used after upgrade to Jaunty or Karmic

I recently upgraded our LTSP servers at the company from Jaunty to Karmic. It was just by coincidence that I noticed a few minutes ago that Ubuntu got a new notification daemon called Notify OSD in Jaunty. I have not noticed any difference in behaviour after the upgrade to Jaunty or the upgrade to Karmic. But having read about it (both good and bad opinions) rose my suspicion that our servers still use the old notification daemon. It turned out that during the upgrade to Jaunty the new notify-osd package was installed indeed (so far so good), but the old notification-daemon was still left behind and apparently if both are installed, notification-daemon is picked by Ubuntu to be used. Uninstalling the latter left only notify-osd which resulted in the appearance of the new notification bubbles. Now that I know we can choose which one to use, I'll leave it up to the users (my colleagues) to decide. If you happen to know how to set/change the order of preference in case both daemons are installed, please share your knowledge in a comment.

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