bug#10740: 24.0.93; shell-command-on-region works via menu but not by keys

[Chong Yidong]

Achim Gratz <Stromeko@nexgo.de> writes:

> "Th. Rikl" <trikl@online.de> writes:
>> To create the keycord M-| i have to hold ALT (means Meta) hold AltGr
>> to get the bar on german keycap <>| and even press <>| .
>> Examining this keycord with C-h k gives a reaction as if i had pressed
>> nothing.
>
> That's because most keyboards can't process these three keys together
> (lookup keyboard ghosting).  You need to use the ESC prefix instead of
> the meta key.  If M-~ also doesn't work, then there might be a problem
> with your X configuration and the mapping of the "Alt Gr" key, but I
> think your problem is simply ghosting.  In any case, Emacs can't do
> anything about it, it simply never got the keypress you think it should
> be getting (most likely it'll see ALT_L and SHIFT_L3 pressed and
> released, which means nothing to do).

I have updated etc/PROBLEMS with this information.  Thank you.