2.5 crashing in gdk_pixbuf_new_from_file()

[Murray Cumming <murrayc usa net>]

I finally built GNOME 2.5 with jhbuild [1] but gnome-session crashes
during login. In "jhbuild shell", I found that almost everything crashes
in gdk_pixbuf_new_from_data(), called by gdk_pixbuf_new_from_file(). I
can't get any of the GTK+ demos or examples to crash though. Does anyone
have an idea?
 
A backtrace from gedit:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1093353280 (LWP 14693)]
0x00000000 in ?? ()
(gdb) bt
#0  0x00000000 in ?? ()
#1  0x410b442d in gdk_pixbuf_new_from_data ()
   from /opt/gnome26/lib/libgdk_pixbuf-2.0.so.0
#2  0x410b47b7 in gdk_pixbuf_new_from_file ()
   from /opt/gnome26/lib/libgdk_pixbuf-2.0.so.0
#3  0x4014c378 in gnome_window_toplevel_set_title ()
   from /opt/gnome26/lib/libgnomeui-2.so.0
#4  0x4014c6c3 in gnome_window_icon_set_default_from_file_list ()
   from /opt/gnome26/lib/libgnomeui-2.so.0
#5  0x4014c75c in gnome_window_icon_set_default_from_file ()
   from /opt/gnome26/lib/libgnomeui-2.so.0
#6  0x0805eeb9 in gedit_set_default_icon ()
#7  0x0805f4dd in main ()
#8  0x420156a4 in __libc_start_main () from /lib/tls/libc.so.6

A backtrace from libgnomecanvas/demo/canvas_demo:

(gdb) bt
#0  0x00000000 in ?? ()
#1  0x4040e42d in gdk_pixbuf_new_from_data ()
   from /opt/gnome26/lib/libgdk_pixbuf-2.0.so.0
#2  0x4040e7b7 in gdk_pixbuf_new_from_file ()
   from /opt/gnome26/lib/libgdk_pixbuf-2.0.so.0
#3  0x0804b370 in setup_images ()
#4  0x0804c3fc in create_canvas_primitives ()
#5  0x0804a21f in create_canvas ()
#6  0x0804a428 in main ()
#7  0x420156a4 in __libc_start_main () from /lib/tls/libc.so.6
(gdb)


[1] Well, I couldn't build the latest cvs fontconfig because the docs
don't build on my Red Hat 9, and --disable-doc doesn't seem to work. The
error is: 

Can't locate SGMLS/Output.pm in @INC 

-- 
Murray Cumming
murrayc usa net
www.murrayc.com