That's the theory some people on a software board are suggesting. That it happened simultaneously on both a pilot's and first officer's iPads suggests that they reached some point on a checklist which called for opening a particular page. And that page's file was corrupt.
Frankly, I'm surprised that the data download process doesn't include a checksum verification (and maybe a signed electronic certificate). You'd want the system to upchuck corrupt data at the time of download, where it might be fixed easily. Not after you've pushed back from the gate.
And then there's the question of why the reading application shuts down the iPad rather than handling the error gracefully.
