JoseGil,

Barcelona is one of the fortunate places which has received a new layer of higher resolution imagery available when the user zooms in to a low altitude.

Interestingly, if you download the file noted in my earlier posting, you will see the area to the north of the city which is misaligned 35 meters, until the user zooms in to see the newer high-resolution data.

It also shows other areas in Spain which are misaligned to varying degrees - Malaga by 20 meters and Granada suburbs by 440 meters. Zooming helps Malaga, but not Granada.