I’m seeing I-now-know-over-blahblah post being posted to my wall every time I finish a lesson. This happens after I reached the 10,000 words milestone in Swedish earlier today. Well, although I don’t mind letting people know of this achievement, I don’t think many will be interested in seeing many duplicated posts. Is this a regression or a new bug? 
@derekhyang - Sorry for the late response. I was certain I’d responded but perhaps I’d just read your post and forgot to respond. In any case, this issue should be resolved in our next update!
@alex - Thanks! this is good to know