I run KDE 4.9.5 on Ubuntu 12.04 with 2 monitors that have different resolutions: 1920x1080 and 1280x1024. The problem is if I resize one Window it automatically resizes all the others to some predefined random coordinates. I have tried various configurations in Window Behavior but with no success. Does anyone know to to properly configure KDE so it works as expected?

The 1280x1024 display is Display 1 and 1920x1080 display is Display 2. If a keep as primary display, Display 1 everything works as expected but if I change the primary display to Display 2 (to have the taskbar on the larger display) I get the above problem.

Err.. What?
If you resize one window, all windows get resized? Really?
Does any window cause this?
Is the "random predefined coordinates" always the same?