When I wake up, I check my mail, Facebook and Twitter. All was well this morning. Ran some errands and was back around 9am. Everything else was fine...except that I could not add comments to any Facebook page. Earlier, some of the pages also looked wrong, but that problem has since gone away. Very annoying. So if you're looking for me on Facebook, I guess you won't find me there today.
By about 10:30, the problem went away as mysteriously as it came. Other people have reported similar problems on Facebook today.