LinuxQuestions.org - Cannot find or run the base session script

I am running FC2 with the default 2.6.5-1.358 kernel. Just recently (today, 06/04/04), after performing an update via yum, restarting the computer, and logging in, I get the following error message:

"Cannot find or run the base session script, will try the GNOME failsafe session for you."

After this everything seems normal. I tried to log into KDE, instead of Gnome, but I get the same error message and the desktop looks like Gnome. Here is a post of my yum.log file. I think it may have to do with one of the packages I upgraded/installed on 06/04/04...i.e. the last three, but I'm not sure. Can I downgrade to the previous versions? I would appreciate any help in this matter, as I appear to be unable to run startup scripts. Thanks.

05/21/04 17:01:01 Updated: kdelibs 6:3.2.2-6.i386
05/21/04 17:01:01 Updated: libgnome 2.6.0-3.i386
05/21/04 17:01:01 Updated: cvs 1.11.15-6.i386
05/21/04 17:01:01 Updated: nfs-utils 1.0.6-22.i386
05/22/04 14:42:46 Installed: xine 0.99.1-1.1.fc2.fr.i386
05/22/04 14:42:46 Dep Installed: xvidcore 1.0.0-1.1.fc2.fr.i386
05/22/04 14:42:46 Dep Installed: libfame 0.9.1-1.1.fc2.fr.i386
05/22/04 14:42:46 Dep Installed: freeglut 2.2.0-11.i386
05/22/04 14:42:46 Dep Installed: xine-lib 1.0.0-0.13.rc4a.1.fc2.fr.i386
05/22/04 14:42:46 Dep Installed: aalib 1.4.0-5.1.fc2.fr.i386
05/22/04 14:42:46 Dep Installed: libdvdcss 1.2.8-4.1.fc2.fr.i386
05/24/04 18:09:43 Dep Installed: id3lib 3.8.3-6.1.fc2.fr.i386
05/24/04 18:09:43 Updated: yum 2.0.7-2.fc.fr.noarch
05/24/04 18:09:43 Updated: gthumb 2.3.3-1.1.fc2.fr.i386
05/24/04 18:09:43 Updated: xmms-mp3 1:1.2.10-2.2.p.1.fc2.fr.i386
05/24/04 18:09:43 Updated: xmms 1:1.2.10-2.2.p.1.fc2.fr.i386
05/24/04 18:09:43 Updated: rhythmbox 0.8.4-1.1.fc2.fr.i386
05/24/04 18:09:43 Updated: grip 1:3.2.0-2.1.fc2.fr.i386
05/24/04 18:09:43 Updated: xmms-skins 1:1.2.10-2.2.p.1.fc2.fr.i386
05/28/04 13:41:44 Updated: flash-plugin 7.0.25-1.i386
06/03/04 14:17:16 Installed: mozplugger 1.5.2-1.i386
06/03/04 14:18:09 Updated: xinitrc 3.41-1.noarch
06/03/04 15:03:18 Installed: mplayer 1.0-0.10.pre4.1.fc2.fr.i386
06/03/04 15:03:18 Dep Installed: faad2 2.0-1.1.fc2.fr.i386
06/03/04 15:03:18 Dep Installed: libmad 0.15.1b-2.1.fc2.fr.i386
06/03/04 15:03:18 Dep Installed: mplayer-fonts 1.1-2.fr.noarch
06/03/04 15:03:18 Dep Installed: lirc 0.6.6-2.1.fc2.fr.i386
06/03/04 15:03:18 Dep Installed: libpostproc 1.0-0.10.pre4.1.fc2.fr.i386
06/03/04 15:03:18 Dep Installed: libdvdread 0.9.4-5.1.fc2.fr.i386
06/03/04 15:03:18 Dep Installed: lame 3.96-1.1.fc2.fr.i386
06/03/04 15:03:18 Dep Installed: lzo 1.08-3.1.fc2.fr.i386
06/04/04 12:48:23 Updated: krb5-devel 1.3.3-7.i386
06/04/04 12:48:23 Updated: strace 4.5.4-1.i386
06/04/04 12:48:23 Updated: krb5-libs 1.3.3-7.i386

Here is my yum.conf:

[main]
cachedir=/var/cache/yum
debuglevel=2
logfile=/var/log/yum.log
pkgpolicy=newest
distroverpkg=fedora-release
tolerant=1
exactarch=0
# Added this because some mirrors go down and then retying takes forever.
retries=1

##################
## Basic Fedora ##
##################

[base]
name=Fedora Core $releasever - $basearch - Base
baseurl=http://mirror.hiwaay.net/redhat/fedora/linux/core/$releasever/$basearch/os
http://rpmfind.net/linux/fedora/core/$releasever/$basearch/os
http://mirror.clarkson.edu/pub/distr...ra/linux/core/$releasever/$basearch/os
http://mirrors.usc.edu/pub/linux/fedora/fedora/fedora/$releasever/$basearch/RPMS.os
http://download.fedora.redhat.com/pu...ra/linux/core/$releasever/$basearch/os
#http://fedora.redhat.com/releases/fedora-core-$releasever
#gpgcheck=1

[updates-released]
name=Fedora Core $releasever - $basearch - Released Updates
baseurl=http://ftp.ens.utulsa.edu/pub/linux/fedora/core/updates/$releasever/$basearch
http://rpmfind.net/linux/fedora/core/updates/$releasever/$basearch
http://mirror.clarkson.edu/pub/distr.../core/updates/$releasever/$basearch
http://mirrors.usc.edu/pub/linux/fedora/fedora/fedora/$releasever/$basearch/RPMS.updates
# http://fedora.redhat.com/updates/released/fedora-core-$releasever
#gpgcheck=1

###################
## Fedora Extras ##
###################

[fedora-stable]
name=Fedora.us Extras (Stable)
baseurl=http://mirrors.kernel.org/fedora.us/fedora/fedora/$releasever/$basearch/RPMS.stable
http://fedora.quicknet.nl/fedora/fedora/$releasever/$basearch/RPMS.stable
http://mirrors.usc.edu/pub/linux/fedora/fedora/fedora/$releasever/$basearch/RPMS.stable
http://fedora.mirror.sdv.fr/fedora/fedora/$releasever/$basearch/RPMS.stable
http://download.fedora.us/fedora/fedora/$releasever/$basearch/RPMS.stable
#gpgcheck=1

###############
## Livna.org ##
###############

[livna-stable]
name=Livna.org - Fedora Compatible Packages (stable)
baseurl=http://rpm.livna.org/fedora/$releasever/$basearch/yum/stable
#gpgcheck=1

#[livna-unstable]
#name=Livna.org - Fedora Compatible Packages (unstable)
#baseurl=http://rpm.livna.org/fedora/$releasever/$basearch/yum/unstable
#gpgcheck=1

############################
## Alternate Repositories ##
############################

# Uncomment these to use them -- note that some packages
# from these repositories may conflict with the fedora.us
# packages. If you use these repositories, you may wish to
# comment-out the fedora.us and livna.org repositories.

#[freshrpms]
name=FreshRPMs
baseurl=http://ayo.freshrpms.net/fedora/linux/$releasever/$basearch/freshrpms/
http://ftp.us2.freshrpms.net/linux/f.../fedora/linux/$releasever/$basearch/freshrpms/
##gpgcheck=1

#[dag]
#name=Dag APT Repository
#baseurl=http://dag.freshrpms.net/redhat/fc$releasever/en/$basearch/dag
# http://ftp.heanet.ie/pub/freshrpms/pub/dag/redhat/fc$releasever/en/$basearch/dag
##gpgcheck=1

###################
## Miscellaneous ##
###################

[macromedia.mplug.org]
name=macromedia.mplug.org - Flash Plugin
baseurl=http://macromedia.mplug.org/apt/fedora/$releasever
http://sluglug.ucsc.edu/macromedia/apt/fedora/$releasever
http://ruslug.rutgers.edu/macromedia/apt/fedora/$releasever
http://macromedia.rediris.es/apt/fedora/$releasever
#gpgcheck=1