Specifying the OS is not enough, you need at least the keyboard layout. It would be impossible to have shortcuts involving | or \ on a French keyboard since they are respectively Alt-Shift-L and Alt-Shift-:
OS X / iBook / fr-fr
« Alt-č » Alt-Shit-č
Good point. I tend to be a bit shortsighted on things like that.
OS X / Powerbook / en_GB
« Option-\ » Option-Shift-\
