The following bug has been logged on the website:
Bug reference: 8610
Logged by: Nick Hajek
Email address: nhajek(at)meridian-technical(dot)com
PostgreSQL version: 9.3.1
Operating system: Windows 7 x64
Description:
Updating a record with a primary key resulted in 2 records in the table with
the same primary key. I'm able to view both using a number of pg manager
application and a select for the single pk value of interest returns 2
records.