ocaml/opam-repository — pull request #2063 by johnwhitington (2014-05-13 14:24:59+00:00)
Title: Updated checksum -- appears the archive has changed at Github

Anil reports the checksum of the archive for CamlPDF 1.7 has changed. There have been no code changes, however.

I found references on the web to the fact that, if Github regenerates the archive for whatever reason, and uses gzip rather than gzip -n, the name of the file and the timestamp become part of the archive, and so the checksum changes.

I still don't actually know what happened in this case, though.

The archive for CamlPDF 1.7.1 has not had its checksum changed -- it is still correct.