guile-gnome crash; help?

Any hints on debugging a coredump that appears to be related to memory 
corruption in a program using guile-gnome-platform?

In my program (gwave) that is built using these:

gtk2-2.10.8-3.fc6
guile-1.8.0-8.20060831cvs
guile-cairo-1.4.0-1
g-wrap-1.9.9-3sgt
guile-gnome-platform-2.15.93-1sgt


I am getting a coredump nearly any time I open (some times not until I 
close) the file selector.  The top of the traceback clearly shows an abort 
in free().  This particular dump came as the guile code was opening a new 
gtk+ window after hitting OK in the file selector.  It isn't quite 
predictable; sometimes the crash happens when openign the file selector.

Any debugging strategy hints would be greatly appreciated.

Loaded symbols for /usr/lib/gtk-2.0/2.10.0/loaders/libpixbufloader-xpm.so
Core was generated by `./gwave'.
Program terminated with signal 6, Aborted.
#0  0x006ce402 in __kernel_vsyscall ()
(gdb) bt
#0  0x006ce402 in __kernel_vsyscall ()
#1  0x007bfd40 in raise () from /lib/libc.so.6
#2  0x007c1591 in abort () from /lib/libc.so.6
#3  0x00c9de2d in free () from /usr/lib/libffi.so.4
#4  0x006597fe in g_slice_get_config () from /lib/libglib-2.0.so.0
#5  0x00659a97 in g_slice_get_config () from /lib/libglib-2.0.so.0
#6  0x00659be5 in g_slice_get_config () from /lib/libglib-2.0.so.0
#7  0x0065ac51 in g_slice_free_chain_with_offset () from /lib/libglib-2.0.so.0
#8  0x006414d1 in g_list_free () from /lib/libglib-2.0.so.0
#9  0x00228869 in gtk_item_factory_new () from /usr/lib/libgtk-x11-2.0.so.0
#10 0x00364207 in gtk_window_set_auto_startup_notification ()
    from /usr/lib/libgtk-x11-2.0.so.0
#11 0x0036e2f5 in gtk_window_new () from /usr/lib/libgtk-x11-2.0.so.0
#12 0x005ef0f9 in g_cclosure_marshal_VOID__VOID ()
    from /lib/libgobject-2.0.so.0
#13 0x005e0589 in g_value_set_static_boxed () from /lib/libgobject-2.0.so.0
#14 0x005e1d9b in g_closure_invoke () from /lib/libgobject-2.0.so.0
#15 0x005f2bef in g_signal_chain_from_overridden ()
    from /lib/libgobject-2.0.so.0
#16 0x005f3957 in g_signal_emit_valist () from /lib/libgobject-2.0.so.0
#17 0x005f3b19 in g_signal_emit () from /lib/libgobject-2.0.so.0
#18 0x00263371 in gtk_object_destroy () from /usr/lib/libgtk-x11-2.0.so.0
#19 0x0035ee21 in gtk_widget_hide () from /usr/lib/libgtk-x11-2.0.so.0
#20 0x0036b1e6 in gtk_window_set_focus () from /usr/lib/libgtk-x11-2.0.so.0
#21 0x005e4420 in g_object_run_dispose () from /lib/libgobject-2.0.so.0
#22 0x0026307e in gtk_object_destroy () from /usr/lib/libgtk-x11-2.0.so.0
#23 0x0035f0d5 in gtk_widget_destroy () from /usr/lib/libgtk-x11-2.0.so.0
#24 0x00ca05c7 in ffi_call_SYSV () from /usr/lib/libffi.so.4
#25 0x00ca0414 in ffi_call () from /usr/lib/libffi.so.4
#26 0x00b35396 in ?? () from /usr/lib/libgwrap-guile-runtime.so.2
#27 0x07ef9cdc in scm_without_guile () from /usr/lib/libguile.so.17
#28 0x00b3556e in ?? () from /usr/lib/libgwrap-guile-runtime.so.2
#29 0x07ed99b5 in scm_set_smob_apply () from /usr/lib/libguile.so.17
#30 0x07e9bea5 in scm_m_generalized_set_x () from /usr/lib/libguile.so.17
#31 0x07e9d50a in scm_m_generalized_set_x () from /usr/lib/libguile.so.17
#32 0x07e99c12 in scm_dapply () from /usr/lib/libguile.so.17
#33 0x07e99e03 in scm_apply () from /usr/lib/libguile.so.17
#34 0x006bee36 in scm_gclosure_primitive_new ()
    from /usr/lib/libguile-gnome-gobject-0.so.0
#35 0x07e89792 in scm_char_upcase () from /usr/lib/libguile.so.17
#36 0x07efc1f6 in scm_c_catch () from /usr/lib/libguile.so.17
#37 0x07e89cf2 in scm_i_with_continuation_barrier ()
    from /usr/lib/libguile.so.17
#38 0x07e89dd3 in scm_c_with_continuation_barrier ()
    from /usr/lib/libguile.so.17
#39 0x07efb2d9 in scm_i_with_guile_and_parent () from /usr/lib/libguile.so.17
#40 0x07efb3ce in scm_with_guile () from /usr/lib/libguile.so.17
#41 0x006bed5b in scm_gclosure_primitive_new ()
    from /usr/lib/libguile-gnome-gobject-0.so.0
#42 0x005e1d9b in g_closure_invoke () from /lib/libgobject-2.0.so.0
#43 0x005f2433 in g_signal_chain_from_overridden ()
    from /lib/libgobject-2.0.so.0
#44 0x005f3957 in g_signal_emit_valist () from /lib/libgobject-2.0.so.0
#45 0x005f3b19 in g_signal_emit () from /lib/libgobject-2.0.so.0
#46 0x001bdd3a in gtk_dialog_response () from /usr/lib/libgtk-x11-2.0.so.0
#47 0x001bdd95 in gtk_dialog_response () from /usr/lib/libgtk-x11-2.0.so.0
#48 0x005ef0f9 in g_cclosure_marshal_VOID__VOID ()
    from /lib/libgobject-2.0.so.0
#49 0x005e1d9b in g_closure_invoke () from /lib/libgobject-2.0.so.0
#50 0x005f2433 in g_signal_chain_from_overridden ()
    from /lib/libgobject-2.0.so.0
#51 0x005f3957 in g_signal_emit_valist () from /lib/libgobject-2.0.so.0
#52 0x005f3b19 in g_signal_emit () from /lib/libgobject-2.0.so.0
#53 0x00171cd3 in gtk_button_clicked () from /usr/lib/libgtk-x11-2.0.so.0
---Type <return> to continue, or q <return> to quit---
#54 0x00173745 in gtk_button_set_alignment () from /usr/lib/libgtk-x11-2.0.so.0
#55 0x0017379d in gtk_button_set_alignment () from /usr/lib/libgtk-x11-2.0.so.0
#56 0x00643a16 in g_source_get_current_time () from /lib/libglib-2.0.so.0
#57 0x00643442 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#58 0x0064641f in g_main_context_check () from /lib/libglib-2.0.so.0
#59 0x006467c9 in g_main_loop_run () from /lib/libglib-2.0.so.0
#60 0x0023d554 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#61 0x08051e1f in gwave_main (p=0x0, argc=1, argv=0xbf872584) at gwave.c:265
#62 0x07eb74d6 in scm_boot_guile () from /usr/lib/libguile.so.17
#63 0x07e89792 in scm_char_upcase () from /usr/lib/libguile.so.17
#64 0x07efc1f6 in scm_c_catch () from /usr/lib/libguile.so.17
#65 0x07e89cf2 in scm_i_with_continuation_barrier ()
    from /usr/lib/libguile.so.17
#66 0x07e89dd3 in scm_c_with_continuation_barrier ()
    from /usr/lib/libguile.so.17
#67 0x07efb2d9 in scm_i_with_guile_and_parent () from /usr/lib/libguile.so.17
#68 0x07efb3ce in scm_with_guile () from /usr/lib/libguile.so.17
#69 0x07eb746f in scm_boot_guile () from /usr/lib/libguile.so.17
#70 0x08051e7a in main (argc=1, argv=0xbf872584) at gwave.c:166
(gdb)