XFCE application shortcuts

[Lucio Crusca <lucio@sulweb.org>]

Hello  *,

I'm trying to bind a keyboard shortcut to control sound volume. I've found 
this:

http://forums.debian.net/viewtopic.php?f=16&t=63591

however when I open "Settings > Keyboard > Application shortcuts" and click 
"Add +", the friendly GUI does not let me enter any shortcut. I'm able to 
enter the command 'amixer set Master 5%+', but above the command text field, 
beside the "Shortcut" text, there's nothing to click or anything suggesting 
a way to enter the shortcut, just gray dialog background. If I try 
confirming the command without a shortcut it obviously complains with a 
error dialog (though the fact it's complaining is only deducible because 
there's no "ok" button, only "cancel" under a recap of an empty shortcut and 
the command I entered).

Maybe it's a bug, maybe it's so obvious how to enter the shortcut that I 
don't get it (I'm a programmer, things that are obvious for others are not 
always obvious for me...)

Wheezy amd64 up-to-date.