After upgrading from 9.1.1 to 9.1.9, pgadmin's server status window gives error

[Brian Wong <bwong@xxxxxxxxxxxxxx>]

Hello,

After upgrading postgresql from 9.1.1 to 9.1.9, launching pgadmin3's server status window gives an error dialog box.  This is a pgadmin3 client on Windows.  The error says:

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An error has occurred:

ERROR: could not access file "$libdir/adminpack": No such file or directory

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What's strange is that the same upgrade was done on another box and that box doesn't have the same problem.

Any one has any idea?  I went into Postgresql and I was able to see adminpack's objects still there.

Brian