But the biggest issue I have with it right now is with the way that grouped email threads are marked read/unread.

It is VERY frustrating and has caused issues so far.

Currently - when you click the whole thread it 'should' show you the most recent unread message.  But the problem is when you want to mark just the last message 'unread', it marks ALL of the messages in the thread as unread.  Which means, when you get back to it and click the regular message - it brings you all the way to down to the very first email.  This is very frustrating when you have 20-30 emails in a thread.

I beg you, for the email threads, PLEASE find another way to mark the whole thread as read/unread....and make top item in focus in your email ONLY mark that specific message as read/unread.

I probably described this in a confusing way...does what I described make sense?  Thanks so much!

Alex