Bug#781297: snapshot.debian.org: Release file hash and actual Sources file hash disagree for 20110430
the following outputs a different MD5sum:
$ curl --silent http://snapshot.debian.org/archive/debian/20110430T000000Z/dists/sid/Release | grep main/source/Sources.gz | head -1
48f6a45ca478467103b968aa56bc341f 6897367 main/source/Sources.gz
$ curl --silent http://snapshot.debian.org/archive/debian/20110430T000000Z/dists/sid/main/source/Sources.gz | md5sum
Unfortunately I do not have time to investigate further.
Thanks for looking into it!