Here is some information that I have gotten from the fedora-devel mailing list. Is it important to gramps, I don't know, but here it is.....
Date: Thu, 10 Jun 2010 15:56:37 -0400
From: Matthias Clasen <email@example.com>
Subject: Re: pygtk3
To: For testers of Fedora development releases
Cc: Fedora rawhide test list <firstname.lastname@example.org>