This is from the FAQ .../postgres/postgresql-v6.4/doc/FAQ:

5.1) How do I make a bug report?

Check the current FAQ at http://postgreSQL.org

Also check out our ftp site ftp://ftp.postgreSQL.org/pub to see
if
there is a more recent PostgreSQL version or patches.

You can also fill out the "bug-template" file and send
it to:
bugs(at)postgreSQL(dot)org

This is the bug template found in the same directory:

If PostgreSQL failed to compile on your computer or you found a bug that
is likely to be specific to one platform then please fill out this form
and e-mail it to pgsql-ports(at)postgresql(dot)org(dot)

To report any other bug, fill out the form below and e-mail it to
pgsql-bugs(at)postgresql(dot)org(dot)

If you not only found the problem but solved it and generated a patch
then e-mail it to pgsql-patches(at)postgresql(dot)org instead. Please use the
command "diff -c" to generate the patch.

You may also enter a bug report at http://www.postgresql.org/ instead of
e-mail-ing this form.

============================================================================
POSTGRESQL BUG REPORT TEMPLATE
============================================================================

Your name :
Your email address :

System Configuration
---------------------
Architecture (example: Intel Pentium) :

Operating System (example: Linux 2.0.26 ELF) :

PostgreSQL version (example: PostgreSQL-6.4) : PostgreSQL-6.4

Compiler used (example: gcc 2.8.0) :

Please enter a FULL description of your problem:
------------------------------------------------

Please describe a way to repeat the problem. Please try to provide a
concise reproducible example, if at all possible:
----------------------------------------------------------------------

If you know how this problem might be fixed, list the solution below:
---------------------------------------------------------------------

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On Mon, 24 Jan 2000, Yury Don wrote:

> Hello All,
>
> Does anybody knows where to send bugreport for postgresql? I can't
> find this information on postgres site.
>
>
> Best regards,
> Yury ICQ 11831432
> mailto:yura(at)vpcit(dot)ru
>
>
>
> ************