Have taken the Intermediate Skybox from the Away 3.6 examples zip and tried to add a Sound3D object following this as an example: http://away3d.googlecode.com/svn/trunk/fp10/Examples/Away3D/as/src/Intermediate_Sound3D.as

But am getting the following error:

ReferenceError: Error #1069: Property away3d:arcane::_objectDirty not found on away3d.core.base.Object3D and there is no default value.
at away3d.audio::Sound3D/_onSceneTransformChanged()[/Users/jolyonruss/Workspaces/Desperados/3DSoundTest/src/away3d/audio/Sound3D.as:205]
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at away3d.core.base::Object3D/notifySceneTransformChange()[/Users/jolyonruss/Workspaces/Desperados/3DSoundTest/src/away3d/core/base/Object3D.as:320]
at away3d.core.base::Object3D/set parent()[/Users/jolyonruss/Workspaces/Desperados/3DSoundTest/src/away3d/core/base/Object3D.as:1357]
at away3d.containers::ObjectContainer3D/addChild()[/Users/jolyonruss/Workspaces/Desperados/3DSoundTest/src/away3d/containers/ObjectContainer3D.as:218]
at Intermediate_Skybox/initSound()[/Users/jolyonruss/Workspaces/Desperados/3DSoundTest/src/Intermediate_Skybox.as:193]
at Intermediate_Skybox/init()[/Users/jolyonruss/Workspaces/Desperados/3DSoundTest/src/Intermediate_Skybox.as:116]
at Intermediate_Skybox()[/Users/jolyonruss/Workspaces/Desperados/3DSoundTest/src/Intermediate_Skybox.as:105]

Am building in FDT with Flex 4.5 SDK and launching it in Player 10.1 standalone Debugger.

Any ideas why this might be happening?

Cheers.