Comment 4 for bug 1058205

Here's a backtrace with install symbols:

==28849== 1,685,652 bytes in 8,263 blocks are definitely lost in loss record 4,540 of 4,541
==28849== at 0x402BE68: malloc (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so)
==28849== by 0x45EF7EA: standard_malloc (gmem.c:85)
==28849== by 0x45EFB62: g_malloc (gmem.c:159)
==28849== by 0x4605D6F: g_slice_alloc (gslice.c:1003)
==28849== by 0x4606285: g_slice_alloc0 (gslice.c:1029)
==28849== by 0x4040A4D: get_private (os-scrollbar.c:655)
==28849== by 0x4044548: hijacked_scrollbar_dispose (os-scrollbar.c:3182)
==28849== by 0x4566786: g_object_run_dispose (gobject.c:1061)
==28849== by 0x4349D60: gtk_widget_destroy (gtkwidget.c:3974)
==28849== by 0x4272E2A: gtk_scrolled_window_destroy (gtkscrolledwindow.c:1247)
==28849== by 0x456258E: g_cclosure_marshal_VOID__VOID (gmarshal.c:85)
==28849== by 0x455F6BC: g_type_class_meta_marshal (gclosure.c:970)
==28849== by 0x4560771: g_closure_invoke (gclosure.c:777)
==28849== by 0x4572960: signal_emit_unlocked_R (gsignal.c:3667)
==28849== by 0x457A731: g_signal_emit_valist (gsignal.c:3300)
==28849== by 0x457A8B2: g_signal_emit (gsignal.c:3356)
==28849== by 0x43570B7: gtk_widget_dispose (gtkwidget.c:10265)
==28849== by 0x4566786: g_object_run_dispose (gobject.c:1061)
==28849== by 0x4349D60: gtk_widget_destroy (gtkwidget.c:3974)
==28849== by 0x4107799: gtk_box_forall (gtkbox.c:1865)
==28849==