Until very recently, when I clicked a folder shown in the left pane of Nautilus, I could see a list of folders and files in the clicked folder displayed in the right pane. Now I can't. I can click the little right arrow to the left of the folder, and it's contents is then displayed in the left pane, not the right. The contents of the right pane does not change.

I can find nothing under Edit -> Preferences which changes this behaviour. Can anyone advise what I need to do to restore the previous behaviour of displaying in the right pane the contents of the clicked folder?

I'm running Fedora10.

TIA,
Jon