Clicked through @googledevtools' tweet and found this nit reading the javadoc.
http://gwt-code-reviews.appspot.com/1451818/diff/5001/user/src/com/google/gwt/core/client/ScriptInjector.java File user/src/com/google/gwt/core/client/ScriptInjector.java (right): http://gwt-code-reviews.appspot.com/1451818/diff/5001/user/src/com/google/gwt/core/client/ScriptInjector.java#newcode37 user/src/com/google/gwt/core/client/ScriptInjector.java:37: * new UrlBuilder("http://example.com/foo.js";).setCallback( Should be FromUrl rather than UrlBuilder http://gwt-code-reviews.appspot.com/1451818/ -- http://groups.google.com/group/Google-Web-Toolkit-Contributors
