As Adrian pointed out some time ago, the IIOP port in the default config in HEAD and branch 3.0 (port 5000) conflicts with a Windows XP service ("SSDP Discovery Service", used for Universal Plug and Play).
I considered changing the default config and moving IIOP to the port officially reserved for IIOP. but this is not a good option. The official IIOP port (683) is in the "well-known port range" (0--1023), normally unavailable to processes with no special privileges. So I requested IANA a port assignment (in the "registered port range", which is from 1024 to 49151) for JBoss. In a couple of weekes we should have our own registered port for JBoss/IIOP. Meanwhile, I do not know what to do with the IIOP port. The current value is causing problems for Windows XP users. Changing it to another "stolen value" is also likely to cause problems... Francisco