title: Google Reader OAuth mark as read
body: <p>I'm using Google Reader API (unofficial) and OAuth authentification. All GET requests work fine, but not POST ones (such as marking an entry as read) - they return 401 error without further explanation. I tried this in code (C#) and in <a href="http://googlecodesamples.com/oauth_playground/index.php" rel="nofollow">Google OAuth Playground</a> and get the same 401 error. What exactly request should I send to Google Reader to mark an entry as read?</p>