## E.311. Release 7.3.20

Release date: 2007-09-17

This release contains fixes from 7.3.19.

### E.311.1. Migration to Version 7.3.20

A dump/restore is not required for those running 7.3.X. However, if you are upgrading from a version earlier than 7.3.13, see Section E.318.

### E.311.2. Changes

- Prevent index corruption when a transaction inserts rows and then aborts close to the end of a concurrent `VACUUM` on the same table (Tom)

- Make `CREATE DOMAIN ... DEFAULT NULL` work properly (Tom)

- Fix crash when `log_min_error_statement` logging runs out of memory (Tom)

- Require non-superusers who use `/contrib/dblink` to use only password authentication, as a security measure (Joe)