Mac OS X Leopard firewall issues

[Mark Slater]

I've been running nginx on MacOS X 10.5 (Leopard), mostly without  
issues. But the firewall is really giving me a headache right now and  
my google searches haven't turned up a solution. For the past year or  
so, nginx has been listed as an application allowed to accept incoming  
connections and it has worked fine. But after a reboot two days ago,  
when the firewall is on, nginx is not allowed to accept connections,  
even though it is still explicitly allowed to in the firewall system  
preference panel.

Has anyone else had this particular headache before? Is there a way to  
solve it other than turning the firewall off completely? (Something  
I'd *really* like to avoid).

Thanks!

Mark