Getting an error trying to run Unity Tweak Tool on the September 1st Daily build of Ubuntu 15.10 x64:
The following schema is missing
org.gnome.settings-daemon.peripherals.touchpad
Thanks to the guys at Ask Ubuntu for the answer:
http://askubuntu.com/questions/616267/cannot-use-the-unity-tweak-tool
Replace occurrences of
'org.gnome.system-daemon.peripherals.touchpad' with
'org.gnome.desktop.peripherals.touchpad'.
This was in the following files:
/usr/lib/python3/dist-packages/UnityTweakTool/section/system.py
/usr/lib/python3/dist-packages/UnityTweakTool/section/spaghetti/gsettings.py