We found an issue very late and it wasn't in the first release notes. The problem below will be surfaced during the database upgrade since the utility is trying to start the FIM Service with an invalid certificate. This is the text I just added to the document:
Known Issues
Service & Portal Update Fails If You Used a Custom Certificate to Install RC1
If, during RC1 installation, you used a custom certificate rather than letting the FIM service installer supply a self-issued certificate, the Service and Portal update will fail. An event log entry will say that the FIM Service cannot start due to a certificate error.
To work around this issue:
1. Back up the FIM Service database.
2. Start regedit and navigate to \HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\FimService. Find the value for “CertificateThumbprint” and save it for later use.
3. Uninstall the FIM Service and Portal.
4. Re-install the RC1 version of the FIM Service and Portal, with the options “Re-use existing database” and “Use self-issued certificate.” This will let the FIM Service installer create the certificate.
5. Install FIM 2010 RC1 Update 1.
6. After installation is complete, start regedit and navigate to the registry key \HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\FimService. Change the value of “CertificateThumbprint” to the value you previously saved.
7. Re-start the FIM Service.
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