If I put in a URL in http://IP:Port/ format, the browser ignores the port number and goes to port 80 instead. If I put in a domain name, then the port number works fine.
related to bug 51237, if not a dup. Reassigning.
Also related: 46552 "home does not work if set to ip:port"
*** This bug has been marked as a duplicate of 51237 ***