According to the screenshot, you are using not gnome-panel, but gnome- shell, thus moving the bug to that package.
** Package changed: gnome-panel (Ubuntu) => gnome-shell (Ubuntu) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-panel in Ubuntu. https://bugs.launchpad.net/bugs/1362420 Title: windows display on all workspaces Status in “gnome-shell” package in Ubuntu: New Bug description: May be in gnome-panel, I'm not really sure. But I cannot find prior evidence of this occuring. Not sure what to attach so I will update if necessary. Recently, all of my workspaces show all active windows regardless of the state of the options selected in the context menu for "Only on available workspace" Version of Ubuntu is 14.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1362420/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp