dart-lang/spark — pull request #43 by ussuri (2013-10-15 04:24:37+00:00)
Title: Fixed: double-execution of webkitStartDart() used to break polymer-element instantiations.

webkitStartDart() is already invoked from polymer/boot.js, which spark.html includes. Second invocation was somehow breaking the process of instantiating polymer-elements: the elements were left uninstantiated.