I hate that the inbox doesn't go to the top of the list when refreshing any more
Inbox no longer automatically goes to the most recent messages after refreshing - I always have to scroll up manually to see my new messages. And when viewing an email with a conversational thread, including forwarded messages, it's very difficult to see the messages in order - they appear to be scrambled or some messages missing. Before the "upgrade," my messages were always displayed clearly and logically, now I can't find anything except the incessant wal-mart ads that I keep rejecting over and over (so you're clearly not interested in our feedback on the ads either.)
Also, my folders are no longer highlighted when there are unread messages in them. This makes it easy for me to overlook messages - exactly the opposite of what I want my e-mail provider to do.
Aside from the storage space, there is no longer any reason for me to use Yahoo mail over any other e-mail provider - in fact, this is quickly becoming intolerable and useless to me.