Sometimes when I open a document and view the Document Map, I discover that Word 2007 SP2 has completely destroyed my outline by assigning seemingly random paragraphs an Outline Level of 1. I then have to manually set 50-100 paragraphs to "Body Text" and hope it doesn't happen again (which it will).
My guess is that it happened somehow during my previous editing session, but I've never seen it change while editing the document. I think it might have something to do with closing the application with the Document Map open.
I tried searching to see if this is a known bug but couldn't find a solution.
Found an article describing the behavior but no mention of a patch by MS. http://www.bitwisemag.com/2/Microsoft-Word-Expletive-Deleted