http://support.microsoft.com/?kbid=911996

Has anyone tried out the post-SP1 rollup of hotfixes yet on their 2005
environment?

I have been testing it in the lab without success. The environment is
a simple one with a Backend (BE1) and two Frontends (FE1 and FE2) in a
child domain off the root. All of it has been working fine up till now with
Windows 2003 SP1 and LCS 2005 SP1 applied to all servers.

I have applied the rollup in the stated order:-
1. stop the LCS service on the FrontEnds
2. run it on the backend with the Poolname=XXX parameter (using the
FQDN of the pool)
3. run it on the frontends (where it restarts the service as well)

Once this is all done I get the error message referred to within the KB
article that implies I did it in the wrong order and/or used a
different version of the update. See below.

A reboot of all servers does not help either.

Any ideas?

Thanks

Mark

P.S. Error message =
Event ID: 30968
Source: Live Communications User Services
Details: The component Live Communications User Services reported a
critical error: code C3EE78F8 (Enterprise Edition Server successfully
registered with the backend, but a stored procedure version mismatch
was detected. The service will not start until this problem is
resolved.)

To resolve this issue, make sure that you use the same installation
package for the front-end servers and the back-end servers."