I just saw a pretty serious bug in 1.1.3 and I wanted to get ahead of things by making a post.
I was sending a rocket to the Mun, and did a few science experiments. I have all my equipment right below a MK1 command pod on the rocket stack. Sent a scientist out on EVA onto the little ladder and grabbed the data -- all normal so far.
Then I hit B to board. The scientist remained outside the rocket in space, and control returned to the rocket. I was completely unable to return focus to the scientist to try to move or board again. When I hit [], the game said "Focus: Sally Kerman", but I was still controlling the rocket with the keys.