I found out same problems. It seems so, that autodesk has changed the exporter, because some differences occur in the fbx files, even I set both exporting dialogs to fbx version 2006 11.
I have to use the older fbx export plugin. (Means use a an older version of 3d Max.)
Kind regards
taratoga
Working on a Machinima Production System based on GS6. www.taratoga.de