hardware: ultra5
netbsd 4.0: 
xfce4 from pub/packages/4.0/sparc64/All
gdb:
Program received signal SIGBUS, Bus error.
0x0000000043f6a1ac in _XData32 () from /usr/X11R6/lib/libX11.so.6
(gdb) bt full
#0  0x0000000043f6a1ac in _XData32 () from /usr/X11R6/lib/libX11.so.6
No symbol table info available.
#1  0x0000000043f90ae4 in XChangeProperty () from /usr/X11R6/lib/libX11.so.6
No symbol table info available.
#2  0x000000004136469c in gdk_property_change ()
   from /usr/pkg/lib/libgdk-x11-2.0.so.0
No symbol table info available.
#3  0x000000000010ebdc in panel_set_size ()
No symbol table info available.
#4  0x000000000010fd28 in panel_init_signals ()
No symbol table info available.
#5  0x00000000441222c8 in g_cclosure_marshal_VOID__VOID ()
   from /usr/pkg/lib/libgobject-2.0.so.0
No symbol table info available.
#6  0x0000000044112e58 in g_closure_invoke ()
   from /usr/pkg/lib/libgobject-2.0.so.0
No symbol table info available.
#7  0x0000000044126a68 in g_signal_override_class_closure ()
   from /usr/pkg/lib/libgobject-2.0.so.0
No symbol table info available.
#8  0x0000000044128088 in g_signal_emit_valist ()
   from /usr/pkg/lib/libgobject-2.0.so.0
No symbol table info available.
---Type <return> to continue, or q <return> to quit---
#9  0x000000004412824c in g_signal_emit ()
   from /usr/pkg/lib/libgobject-2.0.so.0
No symbol table info available.
#10 0x0000000040e1725c in gtk_widget_map ()
   from /usr/pkg/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#11 0x0000000040e288a4 in gtk_window_new ()
   from /usr/pkg/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#12 0x000000004050b0b0 in xfce_panel_window_show ()
   from /usr/pkg/lib/libxfce4panel.so.1
No symbol table info available.
#13 0x00000000441222a0 in g_cclosure_marshal_VOID__VOID ()
   from /usr/pkg/lib/libgobject-2.0.so.0
No symbol table info available.
#14 0x0000000044110fe0 in g_value_set_boxed ()
   from /usr/pkg/lib/libgobject-2.0.so.0
No symbol table info available.
#15 0x0000000044112e58 in g_closure_invoke ()
   from /usr/pkg/lib/libgobject-2.0.so.0
No symbol table info available.
#16 0x00000000441266a0 in g_signal_override_class_closure ()
   from /usr/pkg/lib/libgobject-2.0.so.0
---Type <return> to continue, or q <return> to quit---
No symbol table info available.
#17 0x0000000044128088 in g_signal_emit_valist ()
   from /usr/pkg/lib/libgobject-2.0.so.0
No symbol table info available.
#18 0x000000004412824c in g_signal_emit ()
   from /usr/pkg/lib/libgobject-2.0.so.0
No symbol table info available.
#19 0x0000000040e17cf8 in gtk_widget_show ()
   from /usr/pkg/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#20 0x000000000010b828 in panel_app_run ()
No symbol table info available.
#21 0x000000004451d6a4 in g_ptr_array_foreach ()
   from /usr/pkg/lib/libglib-2.0.so.0
No symbol table info available.
#22 0x000000000010b5d4 in panel_app_run ()
No symbol table info available.
#23 0x000000000010a1c4 in main ()
No symbol table info available.