Comment 5 for bug 726261

Omer, I don't think bug 666288 is the same issue. I think Alex (and if I'm right, my) issue is with that the merging of notifications is broken: https://wiki.ubuntu.com/NotifyOSD#Overflow%20of%20long%20messages

Instead of the previous behavior the bubbles all queue up in succession; so if you have someone IM you six times you'll have six queued bubbles.

Did you file a report or shall I? If you did, please link it here