To reproduce:
1. Open TestScene in project DepthBug using Unity 4.3.4
2. Inspect the Depth Test behaviour on Game Object and expand the nodes until you hit max depth.
3. Notice that you cannot add any additional levels to the tree, but the last level has some data attached to it, the string "H".
4. Close Unity and open the same project using Unity 4.5.1
5. Notice that you get errors claiming that max depth has been reached, when the tree serialised without issue in Unity 4.3.4.
6.Expand the tree again and observe that no data is attached to attached to the last node in the tree, it has been destroyed.
Expected result: Data is preserved
Actual result: Data is lost