Attached is a screenshot of my first login to GNOME. The xterm and gimp were started by logging in to a vt; it's the gconf, nautilus and 'Question' windows which were presented when I logged in. The backtrace seen in the xterm is an xsane bug which is reported elsewhere -- I don't see a .xsession-errors file so I haven't attached that.
Created attachment 122371 [details] screenshot
This seems to have been caused by anaconda installing a bunch of ppc64 packages which weren't required. After removing a whole bunch of packages up to and including libbonobo.ppc64, it started working again. This was a fresh install with the default package selection -- anaconda.log at https://bugzilla.redhat.com/bugzilla/attachment.cgi?id=122432 According to the .bash_history I removed (and reinstalled the ppc32 version of) gnome-panel.ppc64 libgail-gnome.ppc64 GConf2.ppc64 gnome-vfs2-2.13.3-1.ppc64 libgnome-2.13.4-1.ppc64 libbonoboui-2.13.0-1.1.ppc64 libgnomeui-2.13.0-1.ppc64 evolution-data-server-1.5.2-1.1.ppc64 gnome-desktop-2.13.3-1.ppc64 libbonobo.ppc64 at-spi-1.6.6-2.1.ppc64
This is a manifestation of a known bonobo problem. *** This bug has been marked as a duplicate of 156982 ***