First off, this constant-contact-api plugin is fantastic. I am so happy to be able to integrate Constant Contact into WordPress sites in such an easy and thorough way. However, I have noticed something odd on a site I am putting together. The correlation I can make between the errors is that it seems to not be accepting emails with a - in them (i.e. email@example.com). Otherwise it seems to be working great. Is there a reason for this or a way to fix it? (Or is this not a problem for anyone else?) Or at least something I could put as a suggestion to visitors of the site who are having the problem, like in the "Sorry..." message that pops up?