Looks like
Matt beat me to it, but you can read about the issues fixed in SCOM 2007 SP1 RC
here.
20+ issues fixed
1. Error message when you try to access a Web page view in the System Center Operations Manager 2007 Web Console: "Requested value 'UrlViewType' was not found"
2. A notification subscription's Alert Criteria options do not work as expected in System Center Operations Manager 2007
3. When the Health Service (HealthService.exe) runs timed scripts in System Center Operations Manager 2007, high memory usage may occur
4. After a System Center Operations Manager 2007 agent sends discovery data to a management group, no rules are deployed for monitoring in later management groups
5. The System Center Operations Manager 2007 agent is unable to restart the health service after its monitored thresholds are exceeded
6. You cannot install the System Center Operations Manager 2007 Reporting feature in a disjointed namespace environment
7. Some report information does not appear in Japanese in the Japanese version of System Center Operations Manager 2007
8. System Center Operations Manager 2007 cannot find some network devices by using the network device discovery process
9. Some SSL Monitoring monitors display an incorrect status or an incorrect name in System Center Operations Manager 2007
10. Error message when you try to install System Center Operations Manager 2007 Reporting: "The wizard was interrupted before Operations Manager 2007 could be installed"
11. Subscription notification objects in System Center Operations Manager 2007 may not be displayed correctly on a computer that uses a regional setting other than "English (United States)"
12. Some report information does not appear in Japanese in the Japanese version of System Center Operations Manager 2007
13. Error message when you try to generate a report in System Center Operations Manager 2007: "Cannot initialize report"
14. The Entity Health monitor for an Operations Manager 2007 management server displays "Critical" together with a Health Service threshold setting
15. You cannot deploy an agent by using the Discovery and Installation Wizard in System Center Operations Manager 2007
16. The SQL Server 2000 database engine health is not monitored in System Center Operations Manager 2007
17. You may be unable to delete a log file on a client computer in System Center Operations Manager 2007
18. The Operations Manager Audit Collection Service does not start and Event ID 4668 is logged after you install Audit Collection Server from a read-only source
19. A memory leak occurs if an agent of the release version of Microsoft System Center Operations Manager 2007 reports to System Center Operations Manager 2007 Service Pack 1 management servers
20. Management servers that are running the release version of System Center Operations Manager 2007 do not process the agent event data from an agent of System Center Operations Manager 2007 Service Pack 1
