--- export_fbx_bin.original.py	2016-07-25 17:57:03.483014537 +0200
+++ /opt/Blender-2.77a/2.77/scripts/addons/io_scene_fbx/export_fbx_bin.py	2016-07-08 12:55:46.000000000 +0200
@@ -1885,7 +1885,7 @@
         loc, rot, scale, _m, _mr = ob_obj.fbx_object_tx(scene_data)
         rot_deg = tuple(convert_rad_to_deg_iter(rot))
         force_key = (simplify_fac == 0.0) or (ob_obj.is_bone and force_keying)
-        print(force_key, simplify_fac)
+        # print(force_key, simplify_fac)
         animdata_ob[ob_obj] = (ACNW(ob_obj.key, 'LCL_TRANSLATION', force_key, force_sek, loc),
                                ACNW(ob_obj.key, 'LCL_ROTATION', force_key, force_sek, rot_deg),
                                ACNW(ob_obj.key, 'LCL_SCALING', force_key, force_sek, scale))
@@ -2020,6 +2020,7 @@
     # All actions.
     if scene_data.settings.bake_anim_use_all_actions:
         def validate_actions(act, path_resolve):
+            print("\tValidating action " + act.name)
             for fc in act.fcurves:
                 data_path = fc.data_path
                 if fc.array_index:
@@ -2027,6 +2028,7 @@
                 try:
                     path_resolve(data_path)
                 except ValueError:
+                    print("\t\tcurve " + fc.data_path + " did not resolve")
                     return False  # Invalid.
             return True  # Valid.
 
@@ -2073,6 +2075,7 @@
                 # For now, *all* paths in the action must be valid for the object, to validate the action.
                 # Unless that action was already assigned to the object!
                 if act != org_act and not validate_actions(act, path_resolve):
+                    print("\tWARNING: Action discarded because curve did not resolve")
                     continue
                 ob.animation_data.action = act
                 frame_start, frame_end = act.frame_range  # sic!