Hi Sam,
No, no need to start another thread - we routinely chase rabbits across threads, but your question isn't even a rabbit; it is still talking about the original topic!
I don't have experience with the edges getting dry, but then, I've never made bries or such in that size. (I sometimes call what I make as a "camembrie" because it is about 5.5" in diameter - larger than a typical cam, but smaller than a brie.)
My best guess would be to put them in a ripening container to help keep the moisture up. That shouldn't be necessary if the cheese wrap is doing its job, but ... any chance you used the paper wrong side out? I'm not entirely sure, but I think it is intended to be used only in one direction.
Hopefully my post will bump this up, and someone who actually knows about bries will answer (rather than me just, er, shooting the bries, as it were
).