freezing on shortcut test

[gregoryarthur]

twice I've taken the shortcut test and just before the end it freezes. Internet otherwise working fine.

[kristinemc]

What type of internet connection do you use? Are you behind a proxy? I tried to replicate but am having difficulty doing so.

[JohnS52]

I'm having this problem as well. Frequently, when I enter an answer, it just hangs on "grading" and never gets to the next screen or the results. I can reload the browser (Firefox 30.0 for Windows) and go to the next question, but the previous question is never resolved.