[jmesserly]

Wow, seriously? I've been using Beta and not noticed any breakage (but that doesn't mean there isn't any). Do you have any more context?

[stesch]

https://code.google.com/p/dart/issues/detail?id=19489

[bzbarsky]

Ouch. It looks like Dart is using Blink's IDL, not the spec IDL, for generating bindings to JavaScript, so it's only really guaranteed to work in Blink...