Study not advancing past first stimuli. . .

[sten_knutsen]

One of my studies (which was just working perfectly fine earlier today) will no longer advance past the first trial -- it just hangs up. I have another study that is almost exactly the same as this study, and it still works fine. I have been going over my code with a fine-tooth comb, and I can't see any reason why it would display the first trial, and then hang up. I've even switched trials around to see if it's just a bad set of stimuli or something -- same problem.
This was on Chrome, but I also tried on Firefox with the same result.