I just tried to use the show-command in a new gamefile
When testing this command ("show mouse" and a mouse-object is in the inventory) it displays "I don't understand your command." instead of the defaulttemplate "You can't show it". Perhaps there is something wrong with it?

Ah, the verb template exists, but the verb itself doesn't! Logged http://quest.codeplex.com/workitem/942 (it will be a simple addition to CoreCommands.aslx).