Version 8.0.15 is a major release contains a variety of fixes to 8.0.14, including fixes for significant security issues. The fixes:

• Prevent functions in indexes from executing with the privileges of the user running VACUUM, ANALYZE, etc.
• Require non-superusers who use /contrib/dblink to use only password authentication as a security measure.
• Update time zone data files to tzdata release 2007k (in particular, recent Argentina changes).
• Correct planner failure in some cases of WHERE false AND var IN (SELECT).
• Preserve the tablespace of indexes that are rebuilt by ALTER TABLE ... ALTER COLUMN TYPE.
• Make archive recovery always start a new WAL timeline, rather than only when a recovery stop time was used.
• Include those to ecpg parser.
• Make the contrib/tablefunc crosstab() handle NULL rowid as a category in its own right.

Migrating from Version 8.0.x should not require a database dump or restore. If you are migrating from an earlier version, you should consult the PostgreSQL release notes.

You can view the full release notes at http://developer.postgresql.org/pgdocs/postgres/release-8-0-15.html.