Hm, if you do it before when it normally stops does it show text in the text field?
Also, have you tried playing the browser demo, does it get stuck in the same place?
We might be stuck with looking for that "Player.log" file - whatever is the problem might be stopping it outputting the debug info too.
Thanks for helping with reporting - hopefully I can find the issue, but without being able to make it happen, or any error