"git cat-file <sha1>" shows usage but should not?

From: Sebastian Pipping <webmaster@hartwork.org>
Date: Apr 15, 2009, 16:50 UTC
Message-ID: <49E61067.6060802@hartwork.org>

Here is what I did:

$ git cat-file -t b8c11fbbffbe171c4960058fa2d96f708e57a80c commit

$ git cat-file b8c11fbbffbe171c4960058fa2d96f708e57a80c
usage: git cat-file [-t|-s|-e|-p|<type>] <sha1>
   or: git cat-file [--batch|--batch-check] < <list_of_sha1s>
[..]

$ git --version git version 1.6.3.rc0.1.gf800.dirty

Sebastian