This release fixes a significant page ordering issue with Hot Standby which could cause index corruption on the standby under some circumstances. In addition, this update patches timing issues with checkpoint and transaction ID wraparound which could cause data corruption in some cases. This update also fixes multiple issues with CREATE INDEX CONCURRENTLY and DROP INDEX CONCURRENTLY, which can cause those commands to fail or produce corrupt indexes. Users who use this feature may want to REINDEX or recreate affected indexes