The browser.ts file (https://github.com/angular/zone.js/blob/master/lib/browser/browser.ts) is not being bundled inside any closure, resulting in all of its top-level functions and variables becoming globals.

This was discovered because this behaviour was breaking Plunker's preview by overriding window.name to alert. Down the rabbit hole we go and find ourselves here.