Actually I've been having some problems with it too, little bugs like it stopping suddenly and taking me back to the main review page, or hanging up when I click an answer forcing me to restart it, plus some of the pinyin mistakes haven't been resolved. With the pinyin errors now I'm beginning to doubt myself and keep thinking it's tone sandhi that I wasn't aware of or that it's a 多音字 issue. Plus, while I think this reflects more on my inability to use the system more than anything else, I can't figure out how to edit my review wordlist. Adding and deleting words still seems like a 问题 wrapped up in a 谜语 wrapped up in a 迷宫 :(
Also, the old popup test is still not working for me. It stops after a couple questions forcing me to start it over again.