Saw this article come across the CodeProject RSS feed: Setting the SharePoint database straight
Stay out of the SharePoint database… no matter what you think. You are breaking your support boundary if you jump into the database. You should NEVER access it directly… always use the API. If you can’t do it via the API, you shouldn’t do it. Think you found an issue with the SharePoint API/database? Bring it to Microsoft’s attention via a PSS call…don’t fix it yourself.
“AC, what do you know?” Fine, don’t listen to me, but listen to Fitz … he’s in the SharePoint product group in Redmond and his words should make an impact.