Comment 9 for bug 759898

This happens not only before Unity starts, it happens a lot in cases where switching between multi monitors.

1) Connect second(external) monitor
2) Position the outputs vertically
3) Start an application
4) Move it to area of Monitor B(below Monitor A)
5) Close the application while in Monotor B
6) Disconnect Monitor B
7) Start the application

The application moves to a lower worspace and has the title bar under the top panel. Can't move it without closing the application.
Window manager needs to take the title bar(decorations) into account when positioning the newly opened windows.

Monitor A ir dimentioanlly smaller than Monotor B (as an example A = 1600x900 vs B = 1920x1080)

Happens constantly when I connect my TV to laptop, close any applications while they are on my TV and disconnect my TV from laptop.