icedowl - 11:18 pm on Mar 2, 2011 (gmt 0)
I got that message earlier today and the site listed as unauthorized was bing. I previously had a couple of the others that you mention as allowed. I went ahead and added bing to my allowed list. Periodically I'll even see IP numbers listed and they've always turned out to belong to one of the search engines. My list of allowed sites has become a mixed bag of my own sites and search engines. I really don't know if that's the right way to handle it, but no harm has come from it.