Comment 82 for bug 390508

There's also a use case for screenshot applications, like Salasaga, where the notification telling the user a screenshot is about to occur MUST be removed before the screenshot is taken.

Otherwise, all the screenshots have the warning notification itself in them, as happened when notify-osd became the default.

Which is why notify-osd not adhering to something that works fine with the previous (proper, working) implementation is really not scoring points.