Cannot see Conversation History (Grey Overlay)
The new reply systems involves a centred dialogue with a white overlay of the entire browser page. The overlay obscures all the tweets and posts so you cannot refer to them whilst composing the reply. Also the reply box does not do user identifier lookup after a @ symbol. Whatever was wrong with the old system, this new system is dire. Sufficiently so that I cannot use it, but have to go to another UI for Twitter to do replies.