I have a local web server that I cannot access since installing Norton AV 2010. I seem to remember having a similar isue with the previous release. My guess is that I have to allow access from either certain addresses or from a range.
In running Wireshark, I can see the tcp connection to the web server and port complete and the http get request, but no response (though the ack does return to the get).
I can access the web when on the server (http://localhost).