One incompatibility in current implementations is that Object.getPrototypeOf(window) in Opera is Object.prototype whereas the rest have something like Window.prototype (Window doesn't exist in Opera). An interesting consequence of mutable __proto__ and having the global variable record be a "regular" object is that mutating its __proto__ has the same net effect as using `with`.Received on Sunday, 12 August 2012 18:57:36 UTC
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