postgresql-8.3.0-1-binaries-no-installer: gssapi32.dll missed ?

When I try to execute psql.exe or pg_ctl.exe, I got an error: can't find
gssapi32.dll.
see the attachment:
http://www.nabble.com/file/p15282929/pgsql-8.3.0-noinstaller-win32-missing-gssapi32.dll.png
pgsql-8.3.0-noinstaller-win32-missing-gssapi32.dll.png

Does anyone encountered the same problem?
What is gssapi32.dll, and what does it do?


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