After I updated Polymer from 1.0.0 to 1.0.3 via `bower update` , my project and polymer demo(eg. paper-fab/demo/index.html) all get an error: ``` Uncaught TypeError: Cannot read property '_addFeature' of undefined | polymer-mini.html:1054 ```
After I updated Polymer from 1.0.0 to 1.0.3 via
bower update, my project and polymer demo(eg. paper-fab/demo/index.html) all get an error: