CRC Polynomial

[dila]

Thanks for explaining that, it makes sense now.

I'm puzzled by another property of CRC. According to Wikipedia, the function is supposed to be linear:

u = crc32(a ^ b);
v = crc32(a) ^ crc32(b);

Meaning that u==v for bytes a and b. But I'm finding that letting a=0x55 and b=0xAA gives me the checksums:

u=0xFF000000 and v=0x2D02EF8D

So in what sense is CRC linear?