I compile emacs from git daily.
Today under the packages list org shows a 0706 update, but when I select it it doesn't allow me to upgrade, with this message.

Status: Installed in `/home/susan/.emacs.d/elpa/org-20120703/',
shadowing a built-in package.
Version: 20120703

Is this a bug? Shouldn't I be able to get the most current update/