When you click a link from one of the app's inbuilt views to the story page or the Hacker News comment thread, you don't have a "back" button, and I can't find any way other than force-quit-and-restart to get out of it.

(It'd also be nice if, at least on iPhone, the app could produce the same effect as <meta name="viewport" content="width=device-width" /> when viewing external pages; as it is now, such viewing involves lots of tiny text and scrolling, without the Safari reader interface available to mitigate.)

Nice app; I look forward to using it, once the navigation's fixed.