Comment 102 for bug 190754

Correction to my previous comment: While 17-generic greatly improves the situation, and solves it for many usage scenarios, it doesn't fix everything. After several days use, I found a small case or two in which it still happens (e.g. iconifying/deiconifying Deluge to the notification area while Sound Recorder is playing - probably the issue is it takes Deluge a lot of work to redraw itself, but I don't know).

So, the new kernel is a big improvement, but not a complete solution.