@bagnell this is all you...
Open http://localhost:8080/Apps/Sandcastle/index.html?src=Polylines.html
Switch to Columbus view. You'll get
Uncaught TypeError: Cannot read property 'longitude' of undefined
The polyline is passing Cartesian points to a function that wants cartographic. An an aside, we can probably change this function to work in Cartesian space, like I started to do for polygons that cross the IDL.
We should address this soon, but it will not hold up b13 since it is already in b12a (and I suspect others).