BUG #6485: Primary index key not updated uniformly

The following bug has been logged on the website:

Bug reference:      6485
Logged by:          Ramanujam
Email address:      innomotive@gmail.com
PostgreSQL version: 9.0.3
Operating system:   Windows 7 Home Premium
Description:=20=20=20=20=20=20=20=20

Primary key information in pg_attribute table is not updated when a column
name is renamed.

Command used:
ALTER TABLE table_name RENAME COLUMN old_column TO new_column

Entries in pg_attribute still carries old_column.