showPageLoading() never works for me.

showPageLoading() never works for me.

What´s the deal with $.mobile.showPageLoadingMsg()?

I have never got it to work and now i am using 1.1.1 version. In order to get anything like that working i use:
$('body').addClass('ui-loading');
and
$('body').removeClass('ui-loading');

Then it works. Why is that? Is anyone else having problem with the showPageLoadingMsg()?