Why is the Native Client team updating the source code during the contest?
We are updating Native Client’s source code to fix bugs reported by contest participants or exploits identified by our team. Our goal is to protect contestants and other users of the Native Client software from exploits that could damage their system. In addition, by updating our builds, we will be providing you with more opportunities to find new security bugs. Finally, we believe this will make the contest more interesting by continuously raising the bar of bug finding.