Google and Costa Rica / Nicaragua border dispute

Since when did Google Maps become the authoritative source for political borders?

From news.com.au:

NICARAGUA has asked Google not to update its maps following accusations the country accidentally invaded its southern neighbour Costa Rica.  The two Central American nations are locked in a territory dispute sparked by Nicaragua dredging a river along their shared border.  Costa Rica claims Nicaragua soldiers crossed the waterway, pitched tents on a disputed island and raised their country's flag.  Nicaragua denies sending troops over the border.

From Google News:

NEW YORK — Costa Rica on Saturday stepped up pressure on international mediators to engage in its territory dispute with Nicaragua, after Google Maps was cited in an incident that saw the neighboring countries dispatch forces to their joint border.  The Internet search giant joined the fray after a Nicaraguan commander cited Google's version of the border map in an interview with Costa Rican newspaper La Nacion to justify a raid on a disputed border area.