Hello, @neheller ,
Thanks for organizing this great challenge!.

I have downloaded all the image data, like 'master_00000.nii.gz', 'master_00001.nii.gz'...'master_00299.nii.gz'.
But I find that all the data cannot be unzip, when I tried to unzip it, it said, "checksum error, this file is corrupted."
I've downloaded it again twice.
Would you mind tell me how to solve it?