Going to Edit / Preferences causes the app to hang; it redraws correctly on being moved, but no interaction is possible.

Console messages that get dumped when the hang happens:

(sound-juicer:3456): GLib-GObject-WARNING **: specified class size for type `GMAudioProfileChoose' is smaller than the parent type's `GtkComboBox' class size

(sound-juicer:3456): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed

(sound-juicer:3456): GLib-GObject-CRITICAL **: g_object_new: assertion `G_TYPE_IS_OBJECT (object_type)' failed

(sound-juicer:3456): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(sound-juicer:3456): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed

(sound-juicer:3456): Gtk-CRITICAL **: gtk_box_pack: assertion `GTK_IS_WIDGET (child)' failed

(sound-juicer:3456): Gtk-CRITICAL **: gtk_widget_show: assertion `GTK_IS_WIDGET (widget)' failed

Current Rawhide (very current, as I updated from Koji yesterday for all the GNOME Test Day stuff). sound-juicer-2.32.0-4.fc15.x86_64