Leopard Firewall Application Signing

Forgive me if this has been answered/discussed but I couldn't find it through a forum search -

Running 10.5.2, I use the "Set Access for specific applications" setting in the firewall panel. Even though an application is already added and set for allowing connections, leopard still asks me. It even does this with Safari and iTunes sometimes (and not just after an update). This presents a problem when running a full-screen app (such as a game) that requires my input for the "allow/deny connection" dialog.

Reading Apple's documentation, it seems that the firewall should only do this when something as far as the app's "code signature" has been changed. I'm not sure why I constantly have to authenticate this.

Now, to my question! Is there a way around this? Some hard-code fix? What i've ended up doing (when I play Warcraft 3 and need to have the port open), is simply turn the firewall off - but I'd like to find a way around that. Thanks!