BUG #2359: silent Installer for Postgresql 8.1.3 ignores BASEDIR

The following bug has been logged online:

Bug reference: 2359
Logged by: tao.shen
Email address: tao(dot)shen(at)redwahoo(dot)com
PostgreSQL version: 8.1.3
Operating system: winXP
Description: silent Installer for Postgresql 8.1.3 ignores BASEDIR
Details:

Silent Installer for Postgresql 8.1.3-1 ignores DATADIR and BASEDIR. Same
cmd was used with PostgresQL 8.0 successful.

cmd used to install:

msiexec /i postgresql-8.1-int.msi /qr INTERNALLAUNCH=1 ADDLOCAL=server,psql
DOSERVICE=1 DOINITDB=1 SERVICEDOMAIN=%COMPUTERNAME% SERVICEACCOUNT=testacct
SERVICEPASSWORD=P(at)$$wdUs$rP%57gr#s SUPERUSER=postgres
SUPERPASSWORD=testpassword LISTENPORT=5432 BASEDIR=c:\testdir\postgresDB
DATADIR=c:\testdir\postgresDB\data

Error reported:
Failed to run initdb: 1!
logfile in c:\porgram files\postgreSQL\8.1\tmp\initdb.log

initdb: directory "C:/Program Files/PostgreSQL/8.1/data" exists but is not
empty If you want to create a new database system, either remove or empty
the directory "C:/Program Files/PostgreSQL/8.1/data" or run initdb
with an argument other than "C:/Program Files/PostgreSQL/8.1/data".