Comment 4 for bug 1051856

Thank you for reporting this bug to make ubuntu better. However we need to find the package which generates this notification. Unity is definitely not the package. However can you check which program is open for that notification to appear. From your screenshot I can see that Thunderbird, terminal and some other java program is open. Try opening them one by one and see if the notification appears. This way we can close in to the faulty package.

Marking incomplete until further feedback.