Single chacter shortcut in menu (action) item does nothing.

[Raschko]

Involves Pyside+Python 3.2

A simple problem, which is giving me a headache.

given a QAction, then running setShortcut( QtCore.Qt.Key_S ), I am able to have said menu item.
However, pressing 'S' to activate said menu items function, does nothing.

I've tried QShortcut as well, but to no avail.

Should I assume all shortcuts require an accelerator such as CTRL or ALT?

Thank you