I don't know if this will help but an interesting thing to note about the nature of the problem is that when I tried recreating the same setup as shown in the screenshot something interesting happened. Once I added a launcher to the only other visible panel the invisible ones became visible and could be removed. I'm not sure why. I hope this helps further explain and understand the nature of this problem.
-- New added gnome panels get invisible (Mint 9) https://bugs.launchpad.net/bugs/575876 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-panel in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs