I had received an email from the Apple Discussions Boards that a new post was waiting for me. I tapped the url in the email (http://discussions.apple.com/thread.jspa?messageID=4827578#4827578) but I ended up on an error page at apple discussions.
From what I can tell, the # in the url gets escaped to %23 (I think) so you end up with http://discussions.apple.com/thread.jspa?messageID=4827578%234827578 and thus the page fails to load.