Thanks. I'm currently running a quiz with 33 questions, all on the same page. Maybe that's a bad idea: I shan't be doing that again. Last year it was OK: I periodically got them to 'save without submitting'. This year they couldn't.
One guy here clicked on some TeX notation, which took him to a separate window containing the TeX source. Then he clicked 'Back', and all was lost. It wouldn't have happened last year.
Another student got hit by a ddmatch bug that meant he could pick up something to drag and drop, but couldn't drop it. Because he'd not been able to save his work, we were stuffed: we had to note down his answers on a scrap of paper, restart the quiz, and enter the answers again. Obviously the bug was the main issue here (and it's not Moodle core), but again, last year he wouldn't have lost everything.
Would it not make sense to have the 'save without submitting' button as an option, even if it's turned off by default?
James