Stop Ubuntu keyboard shortcuts from "resurrecting"

I use a good deal of the default Ubuntu shortcuts as shortcuts in Emacs (Alt-Space is the most important). I obviously have disabled these shortcuts in the keyboard shortcuts dialog, but for whatever reason, they sometimes "come back", generally after I've installed/uninstalled certain packages, or upgraded Ubuntu.

My question therefore is: how do I keep these shortcuts disabled? I don't want shortcuts like Alt-Space restored for any reason.

Solution 1:

There are several ubuntu bugs in launchpad about keyboard shortcuts settings being reset to default.

It seems that when you switch the 'Backend' setting to 'Flat-file Configuration Backend' in CompizConfig Settings Manager under 'Preferences', the keyboard shortcuts changes seem persistent. You'll have to do a unity --replace for the changes to take affect.