Why can't i drag windows to other spaces when second monitor is connected.
Normally, when I am only using the screen on my MacBook air, I can drag windows to other spaces by dragging them to the edge of the screen and waiting for it to change space. However, when I connect my dell monitor via the displayport, this functionality disables itself. The only way i can now rearrange windows between spaces is to open mission control and dragging the windows to the desired space. Not a massive inconvenience but I would much rather that original function were to stay enabled when connecting a new display.
OS X Mavericks (10.9)