there is a bug I got with version 1.24.
How to reproduce : I check one of the following checkboxes : show to logged-in users - show to not logged-in users
What happen : if uncheck and save, it won't be saved, it remains checked
Solution : in function "dw_update_widget_options", if $new_instance['dw_logout'] or $instance['dw_login'] is not set, nothing is saved, but 0 should be saved
Thank you for you plugin!