Click here to open dialog
Removing the opacity from the overlay stops the memory leak. Keeping this in causes the memory leak at these points:

• document.documentElement[ method ] // method = "scrollTop"
  in jquery-1.2.6.js on line 3522


Removing this line causes the leak to happen at this point


• pLeft += (wnd.width() - this.uiDialog.width()) / 2;
  on line 7812 of jquery.ui.all.js


This leak happens when either the wnd.width() or the this.uiDialog.width() is called. I can step into this and cause the memory leak whilst in debug just by putting a watch on either of these 2 calls