Comment 52 for bug 1224732

I have had a bit of success.

Everything is working again.

I did 3 things:

1. Removed all custom keybindings in dconf editor
2. Installed and the uninstalled xbindkeys
3. Made the system create an .Xmodmap in my user directory

Now all shortcuts are working, including a terminal script being run from my eject key.

Can't say for certain what fixed the issue, but for now working (and i'll be avoiding the gnome control centre for adjusting shortcuts until that is patched)