I updated from 13.04 to 14.04 a few weeks ago.
In 13.04 I was able to change layout pressing L_Shift + R_Shift in this way:
If I press L_Shift, and while pressing it, also press R_Shift and then release R_Shift - layout will change.
In 14.04 this is not working:
If I press L_Shift, and while pressing it, also press R_Shift and then release R_Shift - layout will NOT change until I also release L_Shift.
In case of Ctrl + Shift, this works fine. If you press Shift, then press Ctrl and release - layout will change. It works as in 13.04
How to make Both Shifts behave as in 13.04?
Sorry if it is not clear, don't know how to explain it