I was having problems with the 10-Key yesterday, entering some numbers on a website.  I probably had ProSeries open.  But what I figured out was that if I moved my keyboard a few inches to the left, the problem went away.  I think it had something to do with the wireless connection from keyboard to console, and my cluttered desk.  If ProSeries was open, I know I didn't close it.  

Many of my clients comment on my keyboard made of wood and I always have to correct them that it is made of grass.