Windows 7 64-bit
As far as I know this has only ever worked with the FBX importer found at http://blenderfbx.render.jp/
Short description of error
The rig is defined in SI as a series of empties with constraints in place of bones. Works like a charm with the above importer, as well as the built-in importers of all other tested DCC packages. In Blender, empties are imported with parent constraints, but most aren't in the correct positions making a simple repair script impossible as well.
Exact steps for others to reproduce the error
Just try to import the .FBX. Cheers.