onBrowserDetailsReady() is never called in TouchKit app

I am trying to get TouchKit working for my app. However, my application’s onBrowserDetailsReady() method is never being called, despite the fact I definitely have TouchKit plugged in correctly. I am testing the app with Mac OS X Safari, which should work (it’s a WebKit based browser). Does anyone know why onBrowserDetailsReady() would not be getting called when I hit the app?

Argh. I figured this one out. I was overriding onRequestStart() in my Application subclass without calling super. DOH!