Factual error: Alex Rover travels from San Francisco in a large plane to Borneo, then a small plane to Rarotonga, then a small boat to Tuvalu, then a helicopter to the Buccaneer cruise ship (located close enough to Nim's Island at 20S-162W for her to row there). My globe shows these places to generally be too far from one another given the particular mode of transport. If I were in Frisco and wanted to get to 20S-162W in a hurry, I'd take a flight to LA, then Tahiti, then a smaller flight to Rarotonga, which would be close enough to charter the helicopter to Nim's uncharted island for which the precise GPS coordinates were provided. But Borneo and Tuvalu are too far out of the way to fit with this story.

Visible crew/equipment: When Alexandra is being harassed by the hagglers, she gets into a man's truck after he tells her he knows where to take her. As the truck drives out of the shot the camera is reflected in the window.

Continuity: When Alex reads Nim's first e-mail reply, there's an extra sentence ("He'll be back on Thursday") that Nim never wrote.