Hey im using JQuery UI (1.8.9) and i have 2 nested resizables like this:
$("#resizable2").resizable({
containment: '#resizeable1'
});
$("#resizable1").resizable();
It seems using containment the inner resizeable is locked ( see: http://jsfiddle.net/snASY/ )
Check your spelling: Replace
#resizeable1by#resizable1: