Just tried 2.2. Still has major bugs with unread/read counts. I even tried deleting and downloading new version.
When I switch back and forth between using Newsstand and google reader on my macbook, newsstand does not pickup the most recent read articles from google reader. I have lots of feeds/folders so maybe that causes problems. I tried sync button, starting app, etc. But unread counts are wrong.
Speed of loading new articles is much better.
Still no way (that I can see) to mark article unread.
Still find this kills my memory. I'm syncing 22 feeds. It's a bit faster than the previous version- although not by much even when I've compressed my DB (which seemed to take ages). I have to run memory sweeper quite regularly to free up RAM again.
Really useful app though. I don't get much time with my laptop anymore so it comes in handy to keep up to speed with things.