problem after disconnecting external monitor

[Carpetnailz <carpetnailz researchintegration org>]

Using Fedora 17 on lenovo x120e laptop.
When I connect an external monitor, the monitor is recognized
automatically and works fine as I drag windows to and from it. My
problem is when I want to disconnect the external monitor. My desktop
display is skewed way to the left so that I only see a few of the icons.
(Using 'Have file manager handle desktop' from gnome-tweak-tool.)

There must be some way to do this, but I haven't found it. None of the
ff give me the desktop back properly:
-Use System Settings/Displays to turn off the external monitor before
disconnecting
-Unplug the external monitor before turning it off
-Turn off external monitor before unplugging.

Is there a procedure I'm missing? Or could this be a bug?

Thanks.