Comment 3 for bug 784504

It was actually already unchecked, but I think it was one of the things I did to make it go away. I just got home from vacation for a month, upgraded Ubuntu and have not seen the error since. I tries to provoke it since I saw your message, but the only thing that happened was that the launcher mouseover titles disappeared after a while. I had to switch desktop to make them come back.

I will write back if it happens again. I'm very happy to see this improvement!