I was in reading mode and saw the character 他; I typed in ta1 and it marked it wrong, showing the following screen:
http://www.flickr.com/photos/jww1066/5686538483/in/photostream
Why it should be looking for jiě2guoguo (whatever that means) or jie2guo3 is beyond me. So it looks like some kind of bug.
Note that I am in zh-es mode in case that matters. After I saw this I turned on the JavaScript console but saw no errors.
James