5. Check firebug it raises a "Index or size is negative or greater than the allowed amount" in l.246
exps.getValueSelected = function (ret)
var optionID = this.elem.options[this.elem.selectedIndex].id;
Depending on the context, it appears to be freezing the appli and preventing the passage to another layout.
I haven't been able to reproduce the freezing from a blank capx, but in soldjah's it clearly freezes and prevents to go to a second layout.Example
that raises the error, but still goes to layout1 (starting from layout2)