Hello Didier,
Yes, the line option gives the same result. If you look at the photo closely, at either side of the letter 'K', the support starts 20+ layers from the nearest base surface and then does not go all the way up to support the horizontal section of the 'K' itself. The letter 'E' has support printed in mid-air as does the letter 'N'.
I've opened the file in pronterface to examine it and it is not a GUI issue. I've also sliced the same file in Slic3r with similar settings. The support in Slic3r is much more complete. I'd really rather use Cura, but I need the support to work.