git 1.5.1-rc1 doesn't like empty files

Hello!

I don't know where this problem appeared, but it present in the current git (1.5.1-rc1). Empty files become invalid objects in the repository:

$ touch file 
$ git-init
Initialized empty Git repository in .git/
$ git-add file
$ git-commit -m "first commit"
Created initial commit 16a476808d3cb0a4758997ba58193a9dcfad0fd8
error: garbage at end of loose object
'e69de29bb2d1d6434b8b29ae775ad8c2e48c5391'
 0 files changed, 0 insertions(+), 0 deletions(-)
 create mode 100644 file
$

A file with a one newline is OK (replace "touch file with "echo >file" and the error will go away).

This is Linux, Fedora Development, i386.

The testsuite fails at test 7 in t9200-git-cvsexportcommit.sh, but it seems to be unrelated.