The following bug has been logged on the website:
Bug reference: 6685
Logged by: Mark Thornton
Email address: mthornton@optrak.com
PostgreSQL version: 9.1.4
Operating system: Ubuntu 12.04
Description:=20=20=20=20=20=20=20=20
Executing
create table child_a () inherits (parent)
create table child_b () inherits (parent)
concurrently (two separate connections) results in an error "concurrent
tuple update".
Postgres should be responsible for serializing updates to the shared
resource (whatever it is).