1.2RC3 config won't work on 1.2 Release

[nlevesque]

I attempted to move a config file from a 1.2RC3 box to a 1.2 Release box and everything seems to load fine. The problem isn't that clients can get out, that works fine. The problem is that none of my 1:1 nats seem to work. I can't access any of my servers from the outside, though internally they are accessible.  I don't want to re-build all my nats, rules, and so forth if I don't have to. Anyone have an idea what might be going on. Unfortunately, I am not able to provide the actual config.

Thanks!