OmniWeb acting as a server and listening for connections?

Hi,

I have been running OmniWeb on Leopard now for a couple of days. I  
have my system running with the new application firewall blocking all  
incoming connections with the exception of a few server programs I am  
running (like Nicecast).

Today, the system presented me with the question if I want to allow  
incoming connections for OmniWeb.

My understanding of the new application firewall is that it is based  
on TrustedBSD's Mandatory Access Control and can prevent programs from  
receiving network traffic completely without the need to block  
individual ports. It can simply shut down incoming network access.  
Furthermore, Leopard signs the application's code at the time of  
confirmation to prevent modified copies to inherit access rights given  
to another version.

So my impression is that OmniWeb has indeed requested a network socket  
to listen on. This is something I would not expect from a web browser.  
So the question is: why is this happening?

I think this is highly suspicious. Unfortunately the firewall does not  
come up with any further explanation why it thinks the program wants  
to accept incoming connections. So I am mostly in the dark here. Can  
anybody shed some light on this?

Greetings
Tim