As Gibson states on his site the fault is not UPnP itself, it's Microsoft's UPnP WinXP server. Any mIRC implementation wouldn't use WinXP's server, it would be a client connecting to a different server. It wouldn't make the computer more insecure at all. My support is definitely behind this, my own network could benefit greatly from this and I'm sure there are many others like me.

Edit: Oh, and here's a demo written by someone else who'd like to see mIRC support UPnP: http://www.knoxscape.com/Upnp/NAT.htm
And here's Gibson's own ShieldsUp! demonstrating why not using UPnP can be worse than using it:

Last edited by MrNonchalant; 29/03/04 06:08 AM.