@seamus5,

I've just tested on our iPad using your account and have not had a problem using the review. This is clicking on the "Review" button in the Study Center and going through your default vocabulary that is scheduled for review.

Question: are you still getting this issue now, or did the soft reset of the iPad resolve the problem completely? If the latter, the issue was likely that your iPad had cached the older version of the javascript and incompatibilities between those two versions were causing problems.

Please let me know if you are still having this issue anyway, and - if so - how exactly you are launching the review.