Generally I write about new features, but this change is relatively important. Yesterday, on 20th of July, Robert Haas committed following change: Log Message: ----------- Change the default value of standard_conforming_strings to on. This change should be publicized to driver maintainers at once and release-noted ...

On 13th of November (I know, backlog again), Tom Lane committed patch which make PostgreSQL more strict about what happens in stored procedures in PL/pgSQL: Add control knobs for plpgsql's variable resolution behavior, and make the default be "throw error on conflict", ...