Hopefully toolman can take a look at it (IIRC he was kind enough to perform the initial install). I can find no configuration parameters regarding user contact with regard to this product (not even to one enable/disable it). More annoyingly, I can not even figure out what mechanism it is attempting to use to establish user contact (e.g. PM system, email or some other means unique to this plugin...or, for that matter, how it handles users whom have disabled email notifications and user contact emails for their account) without digging through all its source code ... which I don't have time to tackle right now. And then, of course, to add insult to injury, we have many users whose email addresses are no longer valid and who very likely are not aware of such (e.g. they changed providers but never updated their contact info) -- which is not to say that I'm suggesting this is the case for everyone (or possibly even anyone) reporting this issue, but it may be worth double-checking your contact info and settings just for good measure.
Hopefully another admin can pick up this issue for us. For some odd reason, when I was looking into this earlier I was getting a bunch of Smileys inserted where our banner ad would normally be?!
In the meantime, it is probably best for everyone to stick to PMs -- they are tried and true -- and I apologize for the inconvenience -- hopefully we can find some way to sort out this bug in the near future.