Bug. I work with two monitors, and when I have the Adobe Acrobat window on one monitor, it shows as it should, but when I move the window to the other monitor the icons in the Windows taskbar multiplies, which get very annoying after just a few open dokuments. If I try to close a tab, the "duplicate" window in the taskbar is still there but empty. It has been like this for the last two updates of Acrobat I think. Please fix this error!