Oddity in git commit summary

I just noticed that I got a strange summary from git commit -a --amend with the current master. It said:

Created commit f16cb29: Build in checkout
 5 files changed, 482 insertions(+), 299 deletions(-)
 create mode 100644 builtin-checkout.c
 delete mode 100755 git-checkout.sh

But git show --stat says:
 7 files changed, 780 insertions(+), 306 deletions(-)

And git show --stat -C says:
 6 files changed, 482 insertions(+), 8 deletions(-)

The commit that I noticed this on is available from:

 git://iabervon.org/~barkalow/git.git builtin-checkout

I've never particularly paid attention to this message before, so I don't know if it's saying something accurate I'm not understanding, or if it's actually inaccurate about what it's trying to show.

	-Daniel
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