Can't track untracked file

Don't know if this is a git bug or something I'm doing wrong. Suggestions appreciated.

On a machine named server:

  server[saturday]$ uname -a
  OpenBSD server.snafu.org 5.1 SERVER#342 amd64
  server[saturday]$ git --version
  git version 1.7.6
  server[saturday]$ git status
  # On branch master
  nothing to commit (working directory clean)

Yeah, I haven't updated that machine in a while. Ignore that as everything is fine on that machine. The issue is on another machine:

  $ uname -a
  Darwin dumbcat.snafu.org 12.0.0 Darwin Kernel Version 12.0.0: Sun Jun 24 23:00:16 PDT 2012; root:xnu-2050.7.9~1/RELEASE_X86_64 x86_64
  $ git --version
  git version 1.7.11.3
  $ git clone server:~www/www/saturday
  Cloning into 'saturday'...
  remote: Counting objects: 11401, done.
  remote: Compressing objects: 100% (6868/6868), done.
  remote: Total 11401 (delta 5620), reused 9456 (delta 4523)
  Receiving objects: 100% (11401/11401), 658.01 MiB | 10.79 MiB/s, done.
  Resolving deltas: 100% (5620/5620), done.
  Checking out files: 100% (4454/4454), done.

Everything should be fine, right.  Except...

  $ cd saturday/
  $ git status
  # On branch master
  # Untracked files:
  #   (use "git add <file>..." to include in what will be committed)
  #
  #	2010/
  nothing added to commit but untracked files present (use "git add" to track)

And there is NOTHING I can do to get that directory into git.

  $ git add 2010
  $ git commit -m 'will it work?'
  # On branch master
  # Untracked files:
  #   (use "git add <file>..." to include in what will be committed)
  #
  #	2010/
  nothing added to commit but untracked files present (use "git add" to track)

The directory is not empty. Everything was fine prior to the last commit (into a different directory). I'd originally done the changes and commit on this machine. When things went to hell I repeated the changes on the machine "server" and cloned it as an attempted work-around to the issue.

What next?