Seeing as you are, I assume, French, I wonder if it might be a language problem caused by your Windows settings? e.g. mine is set to Australia, while yours would be France. Just trying to think of why it might be missing those parts, but still work correctly.

As for the strange line, which turns out to be part of the seat, it is similar to what we have seen in the 707 which uses HD textures. Glad you don't have a graphics card problem. ;)

Mark