What version of Ubuntu do you use now. You said you used "ubuntu 6.06" and "upgraded online". Did you upgrade to dapper updates or to edgy? Is the gnome-panel package still installed? Does running gnome-panel from a another session return any message?
What version of Ubuntu do you use now. You said you used "ubuntu 6.06" and "upgraded online". Did you upgrade to dapper updates or to edgy? Is the gnome-panel package still installed? Does running gnome-panel from a another session return any message?