title: Chrome Extension upload error - default_locale missing
body: <p>Whenever I try to upload my updated extension to the Chrome Web Store I get a "default_locale field is missing in manifest." error, yet it is clearly located in my manifest (pasted below).</p>
  
  <p>Any pointers for how I can resolve this?</p>
  
  <pre><code>{
    "manifest_version": 2,
    "name": "####",
    "version": "1.1.0",
    "default_locale": "en-US",
    "description": "####",
    "icons": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "64": "icons/icon64.png",
      "128": "icons/icon128.png"
    },
    "homepage_url": "http://####.com",
    "permissions": [
      "https://*.####.com/*",
      "https://####.com/*"
    ],
    "content_scripts": [
      {
        "matches": [
          "https://*.####.com/*",          
          "https://####.com/*"
        ],
        "css": [
          "src/####/####.css"
        ]
      }
    ]
  }
  </code></pre>