This morning after posting an article I noticed that my "Light Social" bookmarks were displaying vertically instead of horizontally (there's no configuration to make this happen). In addition, the Admin Bar is showing up at the bottom of the page instead of at the top, as vertically stacked text links. At first I thought this might be a theme problem, but I get the same results using various themes. I also tried deleting the latest post, which is when I first noticed the problem, but that hasn't helped.
Any advice would be greatly appreciated.