VS2010 docks code windows in the wrong place

Question

When I double click on an entry in my Error List or Find Results list in VS2010, it docks the newly opened source code file not in the large window where all my other source fil

Answer 1

I got things back to normal by using the Window | Reset Window Layout menu option. I noticed that now the tabs for "Error List" "Output" "Pending Changes" etc were now at the bottom of their docked window rather than the top. I think I somehow or other must have created a second code window area and docked my error list window etc into that.

Incorrectly docked (tabs at the top):

Correctly docked (tabs at the bottom):