<Left-Alt>-<Shift> different from <Right-Alt>-<Shift> in Emacs on FC5

[Erwin J. Prinz]

All:

In a fully upgraded Fedora Core 5, when running Emacs in the graphical 
(Gnome) environment, <Right-Alt><Shift> works as expected, but 
<Left-Alt><Shift> just acts like <Shift>. This is true both for the GUI 
emacs and "emacs -nw" in a terminal.

Conversely, in runlevel 3 (tty) <Left-Alt><Shift> works as expected, 
equal to <Right-Alt><Shift>.

Does anyone know how to get back to the default in the Gnome environment?

Thanks in advance.

Best regards, Erwin J. Prinz