As I wanted to try Ratpoison and other mouseless window manager, I used this .xinitrc
There's a keyboard remapping in there and I'm afraid (but not sure it's this...) it messed up my keyboard settings.
Since, I've deleted this file, however, my Alt+Tab shortcut hasnt been working anymore. In the keyboard shortcuts section, the "Switch Application" shortcut IS assigned to Alt+Tab.
More over, if I try to reassign this shortcut, and then press Alt+Tab, the Alt+Tab shortcut appears and is saved as expected.
However, the shortcut doesn't produce the wanted behavior.
Any idea why this happen and how to fix it?