This year we deployed SCOM 2007 to watch over our SMS infrastructure for server, DB, SMS, performance or other problems. It's been pretty useful for us so far (of course the SCOM console speed is a bit slow, but that's supposedly improved in SP1). Recently however, the "OpsMgr Health Service" has been stopping unexpectedly and not wanting to start back up without a reboot.
In the SYSTEM event log we see the following error:
Event Type: Error
Event Source: Service Control Manager
Event Category: None
Event ID: 7023
Description: The OpsMgr Health Service service terminated with the following error: %%2164195332