Please describe the problem:
After I install FC-5 on my ppc64 box (there is no display monitor connected), I can connect thru vnc to that system.

After getting into the graphic environment, I will see that panel is blank, the Application startup menu is also in blank.

If we change the theme to "Hign Contrast Inverse": white-on-black text and icons, we can get a somewhat better display. No blank in the menu.  But there is still blank in one of our timeline widget.

We can also reduce this to a smaller testcase.  What we are using is the menu example shipped in gtk2-devel package.  When we build this example into binary and execute it. We will see the menu items are blank.  If the mouse move over to it, we can see the text in the menu items.  We can add a screen shot to show this.

Steps to reproduce:
1 start vncserver
2 Modify ~/.vnc/xstartup to start gnome-session

#!/bin/sh

# Uncomment the following two lines for normal desktop:
unset SESSION_MANAGER
exec /etc/X11/xinit/xinitrc

#[ -x /etc/vnc/xstartup ] && exec /etc/vnc/xstartup
#[ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources
xsetroot -solid grey
vncconfig -iconic &
exec gnome-session &
#xterm -geometry 80x24+10+10 -ls -title "$VNCDESKTOP Desktop" &
#twm &

3 login via vnc
4 cd  /usr/share/doc/gtk2-devel-2.8.19/examples/menu/
5 make
6 ./menu
7 press "Root Menu"


Actual results:
Blank menu items

Expected results:
three menu items, each with some texts

Does this happen every time?
yes.

Other information: