Silly question, but have you rebooted?
I know, you shouldn't have to reboot a linux box, but for some reason with WCS upgrades, it helps
what error messages are you getting?
/var/log/httpd/error.log or ssl_error.log
Can you paste output from /var/log/messages & /var/log/httpd/error.log or ssl_error.log
Also, what is the output when you do the following:
/etc/init.d/WCS restart (or /opt/WCS4.1/StartWCS)
hmmm... It is still there, I just downloaded it.
Reviewing the release notes, it seems to be just a maintenance release with no new features.
I think I will hold off a bit and see how others fare with this release
It also fixed the "services stop when local user logs off" bug, even though it was set up as a service. One thing I did notice though is that 4.1 in general seems to be more picky about having the recommend RAM. I had a lot of weird start up errors when i wasn't using the recommend RAM which i didn't when using pre 4.1. Mainly do to VMWare install.