Thanks for the reply.
> Date: Sat, 8 Oct 2011 15:56:31 +0900
> From: ishi soichi <soichi777@gmail.com>
>Just what it says: the lucid.el package is obsolete.
> Recently my emacs produces an error (?) "Package lucid is obsolete!" when
> launched.
> I have no idea what it means...
Do you have some customizations on your .emacs file that load lucid?
If so, remove the command that loads lucid (something like '(load "lucid")'
or '(require 'lucid)'), and see if something stops working; it shouldn't.