The following bug has been logged online:
Bug reference: 5992
Logged by: Rakshit
Email address: r.a.raval@gmail.com
PostgreSQL version: postgresql-9.0.
Operating system: Win 7
Description: The database cluster initialisation failed
Details:
While installing postgresql-9.0.3-2-windows it prompt the message at the end
that "Problem running post installation step. Installation may not be
complete correctly. The database cluster initialisation failed."