JOSEPH BROWNE commented,
I also had this problem that seemed to come from out of the blue. I did things as I've always done them, but then a few days ago playback didn't work, just as described above. So, as Adrian, Mike, ...
JOSEPH BROWNE commented,
Thanks, Borge. I had the same problem. But after pressing Alt/space/R nothing happened. After a good deal of trying things I found that you need to drag the boundaries of the window to resize the l...