After installing LXDE to my Ubuntu 13.10 system, the notifications tooltip theme changed and it remains after uninstalling LXDE.

Also before that, pressing Fn + Arrow Keys in my laptop I could change the volume and brightness settings and a tooltip would show up indicating the current levels, but now that doesn't show anymore.
sudo apt-get install dconf-tools) and then runningdconf reset -f /org/compiz/in terminal. – Paul Tanzini Nov 29 '13 at 23:35/var/log/dpkg.log? – Braiam Nov 29 '13 at 23:57