HIde label of a button in a template

[chrizz]

Hey there,

I just updated PW from 2.3 to 2.4

Everything works fine but: On my contact page which mainly followed this article by soma (http://processwire.com/talk/topic/2089-create-simple-forms-using-api/), the submit button show a lable which is not necessary. If tried a lot to remove it but until now I have no better solution than hide the label with CSS. 

Is there a method to hide labels automatically?

thanks

[Soma]

There was some change to labels and it is hidden via css so you also need to add a hidden class I think InputfieldLabelHidden. One of some changes in core affecting your site after update which is not documented...