Ya salio Postgresql 9.0RC1

Amigos ya esta disponible desde hacer algunas horas el RC1 de la versión 9.0

esta es la nota oficial :)

The first release candidate for PostgreSQL 9.0 is now available.
Please download and test immediately so that we can move rapidly
towards final release. All known bugs should be fixed, so users should
promptly report any bugs which they find.

Note that, due to a system catalog change, an initdb and database
reload will be required for upgrading from 9.0 beta versions. We
encourage users to use this opportunity to test pg_upgrade. Please
report your results.

If you are able to help with testing, please see the testing page:
http://wiki.postgresql.org/wiki/HowToBetaTest

No changes in commands, interfaces or APIs are expected between this
release candidate and the final version. Applications which will
deploy on 9.0 can and should test against 9.0rc1. Depending on bug
reports, there may or may not be more release candidates before the
final release.

Source code, as well as binary installers for many platforms, is
available from the PostgreSQL Web Site:
http://www.postgresql.org/about/news.1230

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