Biped and quadruped guides require Maya 2016 Extension 2

[Ruuttu]

When importing either of the default guides in Maya 2016 without Extension 2 installed, an error appears:

// Warning: file: .../scripts/mgear/maya/shifter/component/_templates/biped_guide.ma line 15810: Unrecognized node type 'shapeEditorManager'; preserving node information during this session. // 
// Warning: file: .../scripts/mgear/maya/shifter/component/_templates/biped_guide.ma line 15812: Unrecognized node type 'poseInterpolatorManager'; preserving node information during this session. // 
# Warning: Errors have occurred while reading this scene that may result in data loss.

Please check the Script Editor for details. # 
# File read in  0.23 seconds. # 
# Error: file: .../scripts/mgear/maya/shifter/component/_templates/biped_guide.ma line 5: Unknown Maya file version: 2016R2. # 

The unknown nodes "shapeEditorManager" and "poseInterpolatorManager" will persist in the scene and prompt further errors if the scene gets saved and reopened.

I'm seeing this with Maya 2016 SP6, but I think it can be assumed to affect any other version of Maya 2016, including Extension 1.