For example:

- My default view is threaded, but I sometimes swithch to flat. If I do so, Index, Previous and Next buttons dissapear (I swear it was OK yesterday - might be intermittent)
- The 'unread' marks just dissapeared from some 80 posts in General forum. I went to personal profile, then the main index, then back to general, and they are back
- Yesterday, a paragraph following a code section refused to wrap
- There was a post several days ago (sorry, I don't remember which one) that produce an error when open was attempted