Issue uploading images/non text files to Rackspace Cloudfiles (MisMatchedChecksumException) via PHP API

I am having an issue uploading to Rackspace Cloudfiles.

I am able to upload anything that is text based (text/html, text/plain etc) but anything else I try fails with the MisMatchedChecksumException which, as I understand it, means the md5_file() on my end doesn't match their computation at their end?

If I don't set the etag (and so this check is not made) the file is uploaded but not correctly, so for exam开发者_如何学Pythonple images have the same size but just don't render?

Does anyone have any tips for how to get past this?

---

The following code works fine for me, can you show a snippet that doesn't work?

    $fname = basename('test.jpg');
    $md5 = md5_file($fname);
    $container = $conn->get_container('my_container');
    $o2 = $container->create_object($fname);
    $o2->content_type = "image/jpeg";
    $o2->set_etag($md5);
    $result = $o2->load_from_filename($fname);
    assert('!is_null($result)');
    assert('$o2->getETag() == $md5');