In this particular case, however:<p><i>[Intel&#x27;s CRC32 CPU instructions] uses different inputs to the CRC32 algorithm (known as the polynomial) which is apparently more robust, and is used in networks, filesystems, that sort of thing. It gives different results to the &quot;standard&quot; polynomial, typically used in compression.</i><p>They would have to go back and recompute all their existing stored checksums.