There have been these annoying glitches in TypeKey comment management in the past, and the source of the problem is inconsistency in how the different science blogs require valid email addresses in your comments. We’re about to enforce a uniform standard across all the science blogs—you will all be required to use a valid email address, although I don’t think it will be displayed—and that might cause a few hiccups here, at first. Give it a chance and it will all shake out, I hope.