As first reported in #27. It seems to affect Enter and Esc.

What happens is that when a user select and program in Switcheroo, and press Enter, then the selected window is immediately focused and activated. The user then releases Enter and the window then receives the message that Enter has been released, and might act on this.

The solution seems to be not to switch to the selected window before the user has released Enter - and likewise with Esc not to dismiss the Switcheroo window before the user releases the key.