I'm using Windows XP Pro, SP1.
My Windows Explorer display has recently changed for some reason unknown to me. The right-hand pane now has "Unspecified" with a blue rule beneath it at the top of the list of files. Prior to this the file list started at the top of the pane.
What does "Unspecified" mean in this case? What have I failed to specify? Why has the word appeared apparently from nowhere? How can I get rid of it?