Im not at home to test, and busy with crunchtime on another project at the moment, but you reminded me Metal_X someone else mentioned that in another thread. I have a theory, and there's an easy way to test it. Its a shot in the dark, but if someone has a moment to try, it'd be helpful
Make two layouts, and on each layout have only one object, and have the object doing something in an 'always' condition. They should be two different object types, and they should each be doing something the other object cannot do, like one be a canvas object clearing the canvas, and the other a text object setting text, for instance. If im right it should crash everytime you change layouts with a transition. If this doesn't work, I have a second theory, for this one add more objects to one layout than the other, and use the objects you added last to be doing those 'always' actions...
I uave one more idea, but ill have to look at the actual code to choose which two actions to make the objects do to crash it.