if you can, and its kind of a timing thing, go to settings, and other networks, then mobile network, and tick the 2G tick, and hit home as soon as you can.
if you get it right, as long as the phone picks up a 2G signal, the message will not come up.
(if it starts coming up in some locations, theirs no 2G network, and its trying to pick up the 3G again)
btw, he has already said its a problem, and when he gets his internet back due to a telecoms problem on the line, (which there now somewhat upgrading it) he will not be able to release an update.
he's doing this himself without modpunks help btw, so if you don't like it, go somewhere else and complain. I'm quite happy this rom, as its still in development. (although it may be on hold)