Maximizing a window happens on wrong monitor (Dual-Monitor setup)

[Charon]

I use a notebook that is connected to an external monitor. I use both displays at the same time (laptop + monitor) to extend the size of the desktop. When I have a non-maximized window and drag it with the mouse to the top of the desktop in order to maximize it I sometimes can see this bug which is really annoying:
When I drag the window to the top on the laptop monitor, the window is maximized on the external monitor, so the window is moved very quickly from one display to another, which is not intendet by me as I move the window on the laptop monitor only. So it seems Unity decides randomly on which display to place the maximized window.
If I can see this bug, I'm just not able to place the maximized window on the other display.

[Charon (charon030)]

BTW: I'm using Ubuntu 12.04 LTS.

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 751605, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.