I want to point out that here we are half a year later and this problem still exsists. I've run into it in every iteration of Carrara since version 5. Each time I had to reboot.

I just ran into it again (I have the latest C8 Pro) and so I decided to search the forums here. Interesting that illkirch should mention the watch video part... I was just watching a bunch of Mark's tutorials... not streaming, but from a CD, but still.

Anyway, thanks for the space bar work-around, it seems to have solved the issue.