Gnome doesn't come up after system & portupgrade

[Ewald Jenisch]

Hi,

After updating both my system/kernel and all installed ports on my
system (9.2/AMD64) gnome2 doesn't come up any more.

Symptoms:

------------------------------ < Cut here > ------------------------------
X.Org X Server 1.7.7
Release Date: 2010-05-04
X Protocol Version 11, Revision 0
Build Operating System: FreeBSD 9.1-RELEASE-p10 amd64 
Current Operating System: FreeBSD mysystem 9.2-STABLE FreeBSD 9.2-STABLE #5 r262601: Fri Feb 28 10:39:56 CET 2014     root at mysystem:/usr/obj/usr/src/sys/GENERIC amd64
Build Date: 26 February 2014  09:06:18PM
 
Current version of pixman: 0.32.4
	Before reporting problems, check http://wiki.x.org
	to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
	(++) from command line, (!!) notice, (II) informational,
	(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Thu Mar 13 14:44:57 2014
(==) Using config file: "/etc/X11/xorg.conf"
Failed to start message bus: Failed to read directory "/usr/local/etc/dbus-1/session.d": No such file or directory
EOF in dbus-launch reading address from bus daemon
xinit: connection to X server lost

waiting for X server to shut down 
------------------------------ < Cut here > ------------------------------

~/.xinitrc is the same as before:

/usr/local/bin/gnome-session

i.e. plain vanilla as per the handbook.

Other than upgrading system/kernel and all ports I didn't change anything. 

My understanding is that the error message "...Failed to read
directory "/usr/local/etc/dbus-1/session.d": No such file or directory
EOF in dbus-launch reading address from bus daemon..." has something
to do with my problem. Unfortunately I couldn't find any hint by doing
a google-search for this error.

So has anybody of you out there seen this messages? 

How could I get up gnome2 up again?

Thanks much in advance for any clue,
-ewald