Keyboard preferences not persisting across boots
Having installed El Capitan, my usual keyboard preferences for mapping Caps Lock to Ctrl, and swapping the Command & Option keys, are not persisting across reboots.
I'm running El Capitan on a late 2012 27" iMac.
Zapping PRAM doesn't help (Option+P+R).
It looks like the settings persist up until some time after I log in, then something resets the keyboard preferences.
iMac, OS X El Capitan (10.11), null