That was it. I booted my old install and I see that's what it had done. Even though it was set at 103239 mIRC was connecting to 37703.
I wonder if something changed where mIRC used to do that same modulo, and that is no longer the case. I don't remember ever figuring this out before...
Thanks for the help!
Last edited by akira; 03/11/15 05:12 AM.