Hello, When my Avast security posts alerts in the lower right hand side of the screen, they only show up where another windows window is onscreen. This is in coherence mode. If there is just a mac desktop there, the alerts don't show up there. If there is a Windows7 window down there, the part of the alert which overlaps the windows7 window appears, but the part that overlaps the mac desktop is invisible. I have to slide the a windows7 window down there to 'uncover' the invisible alert. Is there a way to fix that? Thanks Bob