The following bug has been logged on the website:
Bug reference: 8384
Logged by: Jon Barnhart
Email address: barnhart.jon@gmail.com
PostgreSQL version: 9.2.4
Operating system: Win 7 ultimate
Description:
pgsql/lib is missing libintl.dll so if you try to use libpq from pgsql/lib
rather than pgsql/bin it will fail.