PostgreSQL 6.4.2 on AIX 4.3.2: typeidTypeRelid error

I've seen several postings about this, but no resolution. I've
filed another bug report.

If someone has a fix for this, let me know.

Thanks.

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                        POSTGRESQL BUG REPORT TEMPLATE
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Your name               : David Favor
Your email address      : dfavor@corridor.com

Category                : runtime: back-end
Severity                : critical

Summary: destroydb fails with ERROR:  typeidTypeRelid: Invalid type - oid = 0

System Configuration
--------------------
  Operating System   : AIX 432

  PostgreSQL version : 6.4.2

  Compiler used      : gcc version egcs-2.93.08 19990214

Hardware:
---------
AIX aasc24 3 4 00FFFFFF4C00 (Power PC)

Versions of other tools:
------------------------
gmake - 3.77
bison - 1.25
flex  - 2.5.4

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Problem Description:
--------------------
template1=> create database foo;
CREATEDB
template1=> drop database foo;
ERROR:  typeidTypeRelid: Invalid type - oid = 0
ERROR:  typeidTypeRelid: Invalid type - oid = 0
template1=> \q