Cannot push a commit

[Matthias Fechner <idefix@fechner.net>]

Dear List,

I have a big problem with a file which I cannot push to my central git
repository.
The file can be found here:
http://dl.fechner.net/APP_UD.sch

What I did to reproduce it:
On my server (freebsd with git 1.7.8.3)
cd
mkdir git-test
cd git-test
git init --bare

On my client a windows pc with tortoise git 1.7.6.0 and git 1.7.8.msysgit.0
I cloned the repository over ssh
Added a small test.txt file, commit and pushed it to the server,
everything is fine.
Then a copied the file above to the local repo, added it and commited it.
If I try to push it, I get the error message:
git.exe push --progress  "origin" master:master

Counting objects: 4, done.
Compressing objects: 100% (3/3)
Writing objects: 100% (3/3), 80.00 KiB | 137 KiB/s
Writing objects: 100% (3/3), 91.63 KiB | 137 KiB/s, done.
Total 3 (delta 0), reused 0 (delta 0)
fatal: early EOF
error: unpack failed: unpack-objects abnormal exit
To idefix@fechner.net:git-test
! [remote rejected] master -> master (n/a (unpacker error))
error: failed to push some refs to 'idefix@fechner.net:git-test'

git config -l shows on the windows pc:
core.symlinks=false
core.autocrlf=false
color.diff=auto
color.status=auto
color.branch=auto
color.interactive=true
pack.packsizelimit=2g
help.format=html
http.sslcainfo=/bin/curl-ca-bundle.crt
sendemail.smtpserver=/bin/msmtp.exe
diff.astextplain.textconv=astextplain
rebase.autosquash=true
user.name=Matthias Fechner
user.email=idefix@fechner.net
core.autocrlf=false
core.safecrlf=false
core.repositoryformatversion=0
core.filemode=false
core.bare=false
core.logallrefupdates=true
core.symlinks=false
core.ignorecase=true
core.hidedotfiles=dotGitOnly
remote.origin.fetch=+refs/heads/*:refs/remotes/origin/*
remote.origin.url=idefix@fechner.net:git-test
remote.origin.puttykeyfile=
branch.master.remote=origin
branch.master.merge=refs/heads/master

How can I solve this problem?
Is this maybe a bug in git?

Thanks a lot
Matthias

-- 

"Programming today is a race between software engineers striving to
build bigger and better idiot-proof programs, and the universe trying to
produce bigger and better idiots. So far, the universe is winning." --
Rich Cook