This is related to the half-proprietary app dropbox. I removed it, and now the windows don't show.
** Changed in: gnome-panel (Ubuntu) Status: New => Invalid -- problem when loading panel applets after boot without login screen https://bugs.launchpad.net/bugs/450763 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