Could not decode image: ‘icon-128.png’ Reload Close

{
   "name": "Obviously there's more to my manifest file. Also, I'm not using manifest version 2 yet", 
   "icons":
   {
      "128": "images/icon128.png",
      "16": "images/icon16.png",
      "48": "images/icon48.png"
   }
}