The caps lock key is annoying. It simply sits there to be accidently turned on in circumstances which we least expect...

In vim, when using the command mode, capitol letters are significantly different from lower case ones.

In mutt, the difference between 'd' and 'D' is whether you want to delete one message, or a whole bunch of messages.

And in Red Orchestra, 'f' lets you dive to the ground when people start shooting at you. 'F' does nothing at all :-)

So, no problem... Linux makes is easy to disable the caps lock key. I put this in my .xinitrc file:

xmodmap -e "remove lock = Caps_Lock"

All better now :-)