I'm at the North pole???

While travelling from Cologne to Bremen, I dared to test Google Maps on my mobile - which supposedly is able to  tell where I am with at least a few kilometres of precision.

Therefore, I was rather surprised to discover it showing only a blue square around me... zooming out also showed only a blue square... zooming out AGAIN only showed a blue square... until I zoomed all the way back to the world map and discovered I was at the north pole.

So far, Google had always been at least able to tell me that it can't find my current position - but it seems that whoever assigned the coordinates to the base station I was connected with entered 90N 90E instead...