DStack saveDelta() does not work with List (but works with Object[])

[PicoCreator]

[shiling]

Did the following:

1. Created an ArrayList with 1 element
2. Ran .saveDelta()
3. Added another string to the list
4. Ran .saveDelta() // does not save the new element

When retrieving the object later, the list only has one item, which is the element added when the object is saved for the very first them. The second element is missing.