Comment 87 for bug 1244548

There is a strange thing (worked as workaround for me):
My key combination is Shift + Alt. I'm going to System Settings->Keyboard->Shortcuts, then going to "Typing" section. Click on "Switch to next source". And then, if I push and hold Shift first, then Alt - my combination is <Shift + Mod2 + Meta L>. But if I push and hold Alt, then Shift - combination is <Alt + Mod2 + Shift L>.
And finally: <Alt + Mod2 + Shift L> works perfectly while <Shift + Mod2 + Meta L> doesn't work.