I have a czml file which has 2 entities in it created through the czml-writer. This czml works fine in release 1.2 but when I load it into 1.3 the second entity throws an error when you hit its availability interval. The error message is also attached.
Download czml here: https://drive.google.com/file/d/0BwlMkc-EFmSkaEtWRmZWdUk2NnM/view?usp=sharing