Hi, I just upgraded from alpha3 to beta2, and the same problem. I have Joomla caching enabled, and 'approve comments' enabled in the comments back end. After reviewing a comment in the back end I click 'publish' in the Joomla comment admin interface. But it doesn't show up in the front end until I clean the Joomla cache.
Also, I can't find a way to enable viewing of comments for visitors who aren't logged in, and permit adding comments only when logged in. But when I set 'only registered users can write comments,' they disappear entirely, nopt even browsing of comments is possible unless the user is logged in. Is it meant to do that, or did I do something wrong in the template?