Images are being corrupted

[Darksoulsong]

Images are being corrupted in the creation of the manifest file.
Node version: 0.12.7
NPM version: 2.11.3
Grunt version: 0.4.5

My manifestGenerator config:

    manifestGenerator: {
      dist: {
        options:{
          //is cache all the html files in source files
          //{Boolean}
          //default:true
          includeHTML:true,
          //is cache all the images tags or inline style with background-images in the  html files in source files
          //{Boolean}
          //default:true
          includeHtmlImage:true,
          //is cache all the style files imported by the html
          //{Boolean}
          //default:true
          includeCSS:true,
          //is cache all the background-images in the css contents, which were used by the  html files
          //{Boolean}
          //default:true
          includeCssImage:true,
          //is cache all the js files in the html files
          //{Boolean} 
          //default:true
          includeJS:true,
          //all the files above but the fllowwing files.
          //{Array} the item could be writen as regexpress.
          //default:[]
          excludeFiles:['/\.png$/', '/\.svg$/', '/\.jpeg$/', '/\.jpg$/', '/\.gif$/']
        },
        files: { 
          //the task will scan all the source files, and generate 'dist.manifest' file as the cache setting. 
          '<%= yeoman.app %>/manifest.appcache': [
            '<%= yeoman.app %>/**/*.html',            
            '<%= yeoman.app %>/styles/**/*.*',
            '<%= yeoman.app %>/scripts/**/*.*'
          ]
        }
      }
    }