Same problem here.
Look at the line in my rendered source code:
<input autocomplete="off" class="custom_field date-pick" tabindex="36" name="data_de_nascimento" id="data_de_nascimento" size="25" value="" type="text" /></label>
Note that the class (date-pick) is correct but the script did not label the type of the field as “date”, but “text”. Yes, I’ve selected Date Field in the configuration panel.
Even with the correction posted above, nothing happened. Instead, the code: add_action( ‘admin_head’, array($this, ‘PassHead’) ); ruined the layout of the plugin’s configuration page. Look here.
Thanks in advance!