We just did a fresh install of 2003 Server Standard with ACS 4.1 and it appears everytime we try to apply a change (add a user, add a network device, etc) it takes forever. Sometimes it just hangs and if we shut down the browser and bring up another session it warns us that an admin is already looking at whatever page we were on. Its not a disk space issue. The server is a quad core with plenty of memory. It has the latest java settings and is running SP2 for 2003 server. Anyway seen this issue before?
What I am saying is that regardless of the fact that the server installed correctly and might handle some authentication OK it will fail from time to time, this is due to the fact that the platform you installed it in is not a supported platform by that version. If you ever open a TAC case which you might end doing, you will be asked to move from 18.104.22.168 to 4.1.4 just to support your setup