I more often that not use a laptop for pretty much everything, and I have one with a numpad. Prior to v20 I was able to move bricks around, build and use the numpad just as I can on my PC, yet now it doesn't seem to respond with lock on OR off. I've checked the controls and nothing's wrong there.
What could be the problem, or am I just doomed never to build on a laptop again?
(Please do not say "Use the PC"...It is slow, old and I hate it).