Not mandatory, but could you leave a comment saying that this will be changed to a &lt;link/> as in [this polymer sample](https://github.com/sethladd/dart-polymer-dart-examples/blob/cb464591a87e858a6c2f6fc59ebeb6492a8ff976/web/custom_element_with_style/index.html)? The bug is a new regression: https://code.google.com/p/dart/issues/detail?id=12434.