It seems to be working for me, I just approved a comment on one of my blogs. Weird thing for me is that I've never turned on a requirement for pre-moderation and in the past comments were posted immediately but today it did not get posted until I replied to the email with "Approve". So they may be changing settings on their end. In any case it is not something controlled by mojoPortal code, all we do is load their javascript.
Hope that helps,
Joe