Nightly snapshot out of date

The nightly snapshots are out of date:

http://www.postgresql.org/ftp/stable_snapshot/

I am also unsure what a stable snapshot is, presumably the REL8_1_STABLE
branch, but that isn't clear from this link:

http://www.postgresql.org/developer/testing

I would expect it to be the HEAD branch based on that text.

Kris Jurka