We have a couple new Knowledge Base articles that published the week before last so if you're running either ConfigMgr 2007 or System Center Essentials you might want to check them out:

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http://support.microsoft.com/?kbid=944342
Users cannot modify advertisements that they created in the System Center Configuration Manager 2007 Administration Console
System Center Config Manager 2007 AL
EN-US

http://support.microsoft.com/?kbid=948731
Error message when you try to start the Opsmgr Health service on a Windows Server 2003-based computer: "Could not start the Opsmgr health service on Local computer. Error 0x8004005"
System Center Essentials 2007 EN
EN-US

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Enjoy!

J.C. Hornbeck | Manageability Knowledge Engineer