BUG #6173: 8.3.14 and 8.3.15 do not work on Win2k3x64

The following bug has been logged online:

Bug reference: 6173
Logged by:
Email address: Pete_Wall(at)Symantec(dot)com
PostgreSQL version: 8.3.14
Operating system: Windows Server 2003 x64 Enterprise Edition
Description: 8.3.14 and 8.3.15 do not work on Win2k3x64
Details:

Hello,
I am upgrading the version of PostgreSQL used in our product from 8.3.9 to
8.3.15 to close some of the vulnerabilities. After upgrading, I found that
it wouldn’t work on our Windows 2003 boxes, but it was fine on the 2008
ones. I downloaded every binary release from ..9 to ..15 (from here:
http://www.postgresql.org/ftp/binary/) and found that the problem started
with 8.3.14.

What happens is when I try to launch any of the binaries, I get this message
on the CLI:
C:\tmp\postgresql-8.3.14-1-binaries-no-installer\pgsql\bin>pg_ctl.exe
The system cannot execute the specified program.

When I double-click it in Explorer, I get a dialog box with this message:
"This application has failed to start because the application
configuration is incorrect. Reinstalling the application may fix this
problem."

I then opened it up in Dependency Walker and got this message:
Error: The Side-by-Side configuration information for
"c:\tmp\postgresql-8.3.14-1-binaries-no-installer\pgsql\bin\PG_CTL.EXE"
contains errors. This application has failed to start because the
application configuration is incorrect. Reinstalling the application may fix
this problem (14001).
Error: The Side-by-Side configuration information for
"c:\tmp\postgresql-8.3.14-1-binaries-no-installer\pgsql\bin\LIBPQ.DLL"
contains errors. This application has failed to start because the
application configuration is incorrect. Reinstalling the application may fix
this problem (14001).
It was also not detecting the MSVCR80.DLL, while 8.3.13 found it
automatically.

Here’s a screenshot of Dependency Walker comparing the new with the old:
http://i.imgur.com/FxNkG.jpg

Can someone help me figure out what’s missing? I found "Improve build
support for Windows version" here
http://archives.postgresql.org/pgsql-announce/2011-02/msg00000.php. Maybe
that had something to do with it.

Thanks,
-Pete