loading pg_description ... FATAL: duplicate key violates unique constraint "pg_description_o_c_o_index"

i am trying to install postgresql-8.0.1
i am now trying to do
/usr/local/pgsql/bin/initdb -D data/

however this is what i get:

The files belonging to this database system will be owned by user "surabi".
This user must also own the server process.
The database cluster will be initialized with locale en_US.UTF-8.
The default database encoding has accordingly been set to UNICODE.
fixing permissions on existing directory data ... ok
creating directory data/global ... ok
creating directory data/pg_xlog ... ok
creating directory data/pg_xlog/archive_status ... ok
creating directory data/pg_clog ... ok
creating directory data/pg_subtrans ... ok
creating directory data/base ... ok
creating directory data/base/1 ... ok
creating directory data/pg_tblspc ... ok
selecting default max_connections ... 100
selecting default shared_buffers ... 1000
creating configuration files ... ok
creating template1 database in data/base/1 ... ok
initializing pg_shadow ... ok
enabling unlimited row size for system tables ... ok
initializing pg_depend ... ok
creating system views ... ok
loading pg_description ... FATAL: duplicate key violates unique constraint "pg_description_o_c_o_index"
child process exited with exit code 1
initdb: removing contents of data directory "data"

what is going wrong.

please help,

thanks,
regards
Surabhi ahuja