Comment 6 for bug 334809

This is a real bug, the specification includes provisions to address
this very case.

First, repeated messages from a user in IM should be appended in the
notification, so you see one notification which grows and scrolls rather
than multiple notifications. Each append extends the life of the bubble
slightly.

Second, no bubble should live longer than a certain maximum time, so
that other app notifications can't be DOS'd.

We could probably improve things by saying that an app which has
dominated the presentation space for a period should be deprioritised to
give other apps a slice of the action.

MPT?

Mark