Again, great work.
This is a strange one. I could reproduce it on both an G5 Imac and an MBP.
Using the supergrid with your clips, I set the next button - near the top of the media bin window - to the saw oscillator. After VDVX played the final clip, the saw oscillator red marker at the bottom left, stopped moving and when i tried to click anything, I got the spinning beachball to nowhere.
However, if I dragged the clips so that there were only 10 in a row instead of 12, it worked fine.