Comment 6 for bug 560237

> 5) I use mail-notification, which, on other Lucid systems of mine, is popping up a notification about new emails near the top panel. Here, however, the messages appear as dialog boxes (with ok and cancel buttons) in the middle of the screen, and stay there irrespective of preferences I set.

That is a mail-notification issue, it uses notificaitons with actions, something that notify-osd does not support