I have the exact same issue with taking screenshots in Jaunty with multiple monitors, and I have found a workaround. If I align the top edge of all my monitors, the black bar no longer appears in screenshots of a window or an area of the screen.
I have also opened this bug in gnome's bugtracker. http://bugzilla.gnome.org/show_bug.cgi?id=587101
I have the exact same issue with taking screenshots in Jaunty with multiple monitors, and I have found a workaround.
If I align the top edge of all my monitors, the black bar no longer appears in screenshots of a window or an area of the screen.
I have also opened this bug in gnome's bugtracker. bugzilla. gnome.org/ show_bug. cgi?id= 587101
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