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by _alastair 3260 days ago
> especially since the block sizes are undocumentedly little-endian, while everything else is big-endian.

Yes! That stumped me for a long time. Along the way to solving it I found this great Stack Overflow answer where the creator of ADLER32 popped in to give some advice:

https://stackoverflow.com/questions/32633486/why-are-png-def...

"Also just realized that you are that Mark Adler."