GLib-GObject-WARNING / GLib-GObject-CRITICAL : G_TYPE_CHECK_INSTANCE gsignal.c

I finally got pgadmin3 up and running. Exactly what I wanted, great.
But it core dumps all the time; on exit, resize, cancel a dialog,
closing help dialog. The error and warning messages are always the same
leading up to the crash. Here is example stdout from a run before a
core dump:
(pgadmin3:28738): GLib-GObject-WARNING **: instance with invalid (NULL)
class pointer

(pgadmin3:28738): GLib-GObject-CRITICAL **: file gsignal.c: line 1926:
assertion `G_TYPE_CHECK_INSTANCE (instance)' failed

(pgadmin3:28738): GLib-GObject-WARNING **: instance with invalid (NULL)
class pointer

(pgadmin3:28738): GLib-GObject-CRITICAL **: file gsignal.c: line 1926:
assertion `G_TYPE_CHECK_INSTANCE (instance)' failed

(pgadmin3:28738): GLib-GObject-WARNING **: instance with invalid (NULL)
class pointer

(pgadmin3:28738): GLib-GObject-CRITICAL **: file gsignal.c: line 1926:
assertion `G_TYPE_CHECK_INSTANCE (instance)' failed

(pgadmin3:28738): GLib-GObject-WARNING **: instance of invalid
non-instantiatable type `<invalid>'

(pgadmin3:28738): GLib-GObject-CRITICAL **: file gsignal.c: line 1926:
assertion `G_TYPE_CHECK_INSTANCE (instance)' failed

(pgadmin3:28738): GLib-GObject-WARNING **: instance with invalid (NULL)
class pointer

(pgadmin3:28738): GLib-GObject-CRITICAL **: file gsignal.c: line 1926:
assertion `G_TYPE_CHECK_INSTANCE (instance)' failed

(pgadmin3:28738): GLib-GObject-WARNING **: instance of invalid
non-instantiatable type `<invalid>'

(pgadmin3:28738): GLib-GObject-CRITICAL **: file gsignal.c: line 1926:
assertion `G_TYPE_CHECK_INSTANCE (instance)' failed
Segmentation Fault (core dumped)

I couldn't find anything in the archives relating to the this. What has
gone wrong here? If I need to provide more information, just let me know.

~S

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