Please describe the problem:
When I use the composite extension, gnome-theme-manager is unable to draw the
themes icons (only b&w icons with question mark).
I have the following error messages :


(gnome-theme-manager:6218): Gdk-CRITICAL **: gdk_drawable_set_colormap:
assertion `cmap == NULL || gdk_drawable_get_depth (drawable) ==
cmap->visual->depth' failed

(gnome-theme-manager:6218): GLib-GObject-CRITICAL **: g_object_get_qdata:
assertion `G_IS_OBJECT (object)' failed

(gnome-theme-manager:6218): Gdk-CRITICAL **: gdk_colormap_get_visual: assertion
`GDK_IS_COLORMAP (colormap)' failed

(gnome-theme-manager:6218): Gdk-CRITICAL **: gdk_visual_get_screen: assertion
`GDK_IS_VISUAL (visual)' failed

(gnome-theme-manager:6217): capplet-common-WARNING **: Received EOF while
reading thumbnail for gtk: 'Simple', metacity 'Simple', icon: 'gnome', font:
'Sans 10'

Steps to reproduce:
1. enable composite in xorg.conf
2. run gnome-theme-manager
3. 


Actual results:
no theme preview displayed

Expected results:
theme preview displayed, as it is with composite no enabled

Does this happen every time?
yes

Other information:
stations is a FC3 (Xorg 6.8.2) whith garnome 2.10.2 in /opt
gtk+ is 2.6.7
Card is an ATI Radeon X300.
I remember that I saw once the --disable-composite option for one gnome
application but I can't remember which ... I just check for gtk+ but there's not
such option.
I have the feeling that this "--disable-composite" is the key : if yes, sorry
for this unuseful bug report. :-)