The following bug has been logged online:
Bug reference: 5699
Logged by: Johannes Meidert
Email address: johannes(dot)meidert(at)rohde-schwarz(dot)com
PostgreSQL version: 9.0.1
Operating system: windows
Description: Postgres runs only under default user.
Details:
If a --superaccount is specified during installation other than 'postgres',
the service will not start correctly and there are lots of errors "role
<postgres> does not exist" in the DB error log.
The option -- superaccount should be removed.
Work around: use postgres and add the user later.