Warning : some browsers like Opera/Chrome/Safari take the liberty to unzip the file by themself and badly rename them. If the file is more than 1GB, it is already unzipped.
However, that is now incorrect in some cases - the x86_64 image is now 1.1gb compressed.
As they add more content it's going to get bigger it decompress to 3 gigs almost.
@nfriedly fixed. thanks.