Some significant changes have been introduced in beta3 which will require
some applications to be re-tested with 9.0. These include:

* Fixes for streaming replication and hot standby:
* close walwriter filehandles faster
* fsync on master before sending WAL
* improved handling of archive cleanup
(including archive_cleanup_command
and pg_archivecleanup contrib module)
* better handling of WAL record corruption
* change of standby delay settings and timing
* Fix for array handling in plpython
* Many dblink fixes
* TCP keepalive support in libpq
* Fix for checkSeek() behavior on old platforms
(was causing pg_dump to occasionally fail)


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

Betas are not stable and should never be used in production; they are for
testing only. Additional beta releases, or a release candidate, will be
available for testing in a few weeks.

Source code, as well as binary installers for many platforms, is
available from the PostgreSQL Web Site:
* Source: http://www.postgresql.org/ftp/source/v9.0beta3
* One-Click Installer, including Win64 binaries:
http://www.enterprisedb.com/products/pgdownload.do
* Binaries for other platforms:
http://www.postgresql.org/ftp/binary/v9.0beta3
* Release Notes:
http://developer.postgresql.org/pgdocs/postgres/release-9-0.html
* Participating in Testing:
http://www.postgresql.org/developer/beta