By the way, if you don't know how to check this, the relevant keys are in the Configuration Editor, the node:
/apps/panel/toplevels/<whatever panel you have>/auto_hide_size Set it to zero, set the panel to autohide (check key auto_hide right above the other), then move the mouse on and off the panel to make it hide. You might need to temporarily disable the wallpaper and/or change the desktop color to notice the line (black works best for me, but I guess it depends on your theme). -- panel-autohide leaves a one-pixel line on the desktop https://launchpad.net/bugs/83034 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs