Thanks alot - your answer solved all my problems after svereal days struggling
(Mon 15 Oct 2012 11:57:48 AM UTC)
I get a fairly dcneet number of legitimate-but-random commenters, who will definitely disappear when this change is implemented. I'm sure something needs to be done about the huge volume of worthless commenters, but I wonder if there is some alternative (word verification, etc.) to Typepad.