Git clone fatal when using git-shell account

I have a machine containing a "central" git repo, which I access via SSH using an account that uses /bin/bash. From my laptop, doing a clone works. But when I change the shell on the central machine to git-shell (which is listed in /etc/shells), the clone fails.

Clone using /bin/bash:

    tmp[82] > git clone ssh://cameron@churn/Users/Shared/src/jmatch.git
    Initialize jmatch/.git
    Initialized empty Git repository in /private/tmp/jmatch/.git/
    Password:
    remote: Counting objects: 1690, done.
    remote: Compressing objremote: ects: 100% (1239/1239), done.
    remote: Total 1690 (delta 424), reused 1683 (delta 422)
    Receiving objects: 100% (1690/1690), 3.62 MiB | 2332 KiB/s, done.
    Resolving deltas: 100% (424/424), done.

Clone using /opt/local/bin/git-shell:

    tmp[81] > git clone ssh://cameron@churn/Users/Shared/src/jmatch.git
    Initialize jmatch/.git
    Initialized empty Git repository in /private/tmp/jmatch/.git/
    Password:
    fatal: The remote end hung up unexpectedly

Laptop (Tiger OS X 10.4.11):

    git version 1.5.6.1

Central (Leopard OS X 10.5):

    git version 1.5.6.1

Configuration of repository:

[core]
        repositoryformatversion = 0
        filemode = true
        bare = true
        ignorecase = true
        sharedrepository = 1
[receive]
        denyNonFastforwards = true

I couldn't find this issue discussed anywhere, so, I post in hope that someone has run into it before.