1.4.1 change from 1.3.2 .add()

1.4.1 change from 1.3.2 .add()


"As of jQuery 1.4 the results from .add() will always be returned in document order (rather than a simple concatenation)."
 
I don't know why but this stopped working:
 

var popup = jQuery( '<div id="HowToStartPopup"></div>' );

var popupContent = jQuery( '<div id="HowToStartPopupContent"></div>' );

var popupCloseBtn = jQuery( '<a href="#" id="HowToStartPopupCloseBtn" title="Close Popup">[x]</a>' );

popupContent.add(popupCloseBtn).appendTo(popup);

in 1.3.2 popupContent and popupCloseBtn  are both children of popup

in 1.4.1 popupContent is the only child of popup