Apple aluminum USB keyboard and Ctrl-key combinations in emacs

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http://askubuntu.com – I have a problem with Ctrl-key combinations in emacs with the Apple USB keyboard. I have set Caps-Lock as an additional Ctrl key. When using the Caps-Lock as Ctrl, 'Ctrl-x Ctrl-f' sometimes registers properly but sometimes registers as 'x Ctrl-f'. This happens both when I release and depress the Ctrl key or hold the Ctrl key and do 'Ctrl-x-f'. Since it seems random which case occurs, I am not sure how to debug this. When using the real right or left Ctrl keys, this doesn't occur. It seems to be an issue with the keyboard as I tried another keyboard without a problem. I also don't seem to ha (HowTos)