[Evolution] Running evolution-3.2.2 outside of the gnome desktop?

[walt <w41ter gmail com>]

Hi team.

I have an x86 (gentoo) machine where I've installed xfce4 along side
gnome3 (because IMHO gnome3 isn't ready yet) and I want to use evolution
from inside xfce4 instead.

Evolution works normally when run inside gnome3, but when run from inside
xfce4 it sits for 10 or 15 seconds and then dies with this:

$evolution

(evolution:7056): e-menu-tool-button.c-CRITICAL **: menu_tool_button_clone_image: assertion `image_type == 
GTK_IMAGE_ICON_NAME' failed

(evolution:7056): Gtk-CRITICAL **: gtk_widget_show: assertion `GTK_IS_WIDGET (widget)' failed

(evolution:7056): e-utils-WARNING **: Icon 'mail-attachment' not present in theme

e-utils-ERROR **: Icon 'gtk-missing-image' not present in theme
Trace/breakpoint trap

These gnome services are still running in xfce4 session:
/usr/libexec/gvfsd
/usr/libexec/gdu-notification-daemon
/usr/libexec/polkit-gnome-authentication-agent-1
/usr/libexec/gvfs-gdu-volume-monitor
/usr/libexec/notification-daemon
/usr/libexec/gconfd-2
/usr/libexec/gvfsd-http --spawner :1.11 /org/gtk/gvfs/exec_spaw/1
/usr/bin/gnome-keyring-daemon --start --foreground --components=secrets
/usr/libexec/e-calendar-factory   <<<<< xfce4 runs this for me at startup

I use ck-launch-session to start xfce4, and there are system and session
daemons running as well, just as in gnome3.

Can you see anything obviously wrong with this setup?  Evolution seems to
be trying to contact somebody or listen to a socket, maybe?  What things
should evolution normally do during the first few seconds after starting?

Even very vague hints would be most useful :)

Thanks!