I also can confirm the "Both Alt keys together" bug. With "Both Alt Keys together" selected, neither pressing the keys or clicking the Keyboard Indicator applet I added to the Panel change the layout. The "Both Shift keys together" seems to fix it with both pressing the keys and clicking the Keyboard Indicator on the Panel.
I also can confirm the "Both Alt keys together" bug. With "Both Alt Keys together" selected, neither pressing the keys or clicking the Keyboard Indicator applet I added to the Panel change the layout. The "Both Shift keys together" seems to fix it with both pressing the keys and clicking the Keyboard Indicator on the Panel.