Updating the Review tool - things may be funky for the next hour or so (May 25th, 5:00pm). Will post here with an update when finished.

UPDATE: the first round of changes are in the system. These change the pinyin test from focusing exclusively on tones to swapping out more complex phonetic changes as well. Am not happy with the quality yet, so it isn't implemented for everyone yet. The rest of the review should be back to normal though.