Hash does not match

After updating to Unity 4.2. and building a Windows Stand Alone build.

I'm now getting this error when trying to load a level into my core code.

AssetBundle loading failed because the NavPoints script serialization hash does not match. Supported: e5abaae3, loading: e6079c19

Process
I have a level that I create in Unity. I then publish it to a .unity3d bundle.
The level bundle is then loaded using www = new WWW(blah) in my Core code Unity project.
The level never gets loaded because of the error above.

This process has worked until updating Unity to 4.2.

NOTE: this process does work for a Unity Web Build.

Anybody have any ideas how to resolve this issue.

 

Having the same issue, did you resolve this?

@Unity --- a full list of all errors possibly potentially generated by your engine, located somewhere in your documentation for reference, would be so hugely useful... failing that, participating in a thread like this might help too..