Hi! Commit r719145 broke the messagebundles behavior.
AbstractMessageBundleFactory.getBundle() gets parent and child MessageBundles, then creates and returns a new MessageBundle that's the union of both. However, MessageBundle(MessageBundle parent, MessageBundle child) leaves this.jsonString null, so when RenderingContentRewriter.injectMessageBundles() calls bundle.toJSONString(), it just gets null back. This results in JavaScript being generated like gadgets.Prefs.setMessages_(), which effectively sets the prefs.messages value to undefined, causing any gadget that uses message bundles to fail on the first prefs.getMsg() call. iGoogle/Orkut are broken as a result. Thanks, Dave
