Problem with submodules

I am having trouble with submodules on one of my machines. When I run `git submodule init`, then `git submodule update`, it looks as though everything is going fine, then it crashes out with an error: "pathspec '665a3c' did not match any file known to git.". (The full output is pasted below).

According to this article: http://book.git-scm.com/5_submodules.html under the heading "Pitfalls with submodules", this error is expected to occur if you don't publish changes to a submodule. This doesn't seem to be the problem in my case. I have tried installing the same git repository on 2 other machines, and the submodule init/update commands worked fine on both of them. So it looks as though there is something on one of my machines that is interfering with this process.

I discovered that if I run the `git submodule update` command as sudo, the problem goes away. However, this has the side-effect that the submodule directories are created with root as the owner.

Can anyone help with this problem?

Much appreciated, Drew

Here is the full output of the init/update commands, with my faulty machine:

$ git submodule init Submodule 'vendor/plugins/dataset' (git://github.com/jgarber/ dataset.git) registered for path 'vendor/plugins/dataset' Submodule 'vendor/plugins/simply_versioned' (git://github.com/mmower/ simply_versioned.git) registered for path 'vendor/plugins/ simply_versioned' $ git submodule update Initialized empty Git repository in /Users/drew/web/extensions/ chronicle/vendor/plugins/dataset/.git/ remote: Counting objects: 899, done. remote: Compressing objects: 100% (692/692), done. remote: Total 899 (delta 539), reused 250 (delta 158) Receiving objects: 100% (899/899), 141.93 KiB | 42 KiB/s, done. Resolving deltas: 100% (539/539), done. error: pathspec '665a3c03f6a65a586839b8de437c60f98177dd78' did not match any file(s) known to git. Unable to checkout '665a3c03f6a65a586839b8de437c60f98177dd78' in submodule path 'vendor/plugins/dataset'