I have dual monitor setup. Internal notebook screen on the left, external monitor on the right (as primary screen), spanning enabled.

See 0-original.png to see the setup.

After I turn off primary notebook screen, everything is OK (applications from the left screen move to the right screen, that's correct).

See 1-display_off.png to review this step.

But after I turn on the primary notebook screen back again, all my applications move to the first workspace. There is no reason for it (I just added a display, the workspaces may stay intact) and it is inconvenient (I have to organize them into workspaces again).

See 2-display_back_on.png to review this broken step.

gnome-shell-3.0.2-4.fc15.x86_64
Fedora 15