I notice this is still not fixed, and it's been five years since the OP. I assume the idea was voted down, but that makes no sense.
I've run into a lot of glitches and time sinks with the fill-in-the blank question feature, because it does not automatically go back and re-apply changes I make in the key when there was a mistake or omission. There still appears to be no button I can click to regrade either, the way there is with the multiple choice questions. The point of having write-in questions key graded is for me not to have to and hand grade everything individually, but sometimes I discover students are coming up with a correct answer I hadn't anticipated when making a key, so I need to add something and have it automatically fix it! I'm finding that even students who turn in their quizzes after I fixed the key are being graded with the old key as well.
I'd love to see this fixed.
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