It may be helpful for the experts
- to see the full FreeCAD infos
- to know where FreeCAD is installed. Does the path contain any chinese characters?
- Does the user name contain any chinese characters?
It makes perfectly sense to distinguish attached and not attached items, as we have seen here some troubles. The concept should be extended to sketches and primitives. To not overload the tree it would be sufficient to mark only the non attached items.