For me, connections are more stable now. With 7.5, some people
say I never reply them when I didn't even see their messages. This
new version solves it. You can even send messages when your
contacts are offline, so when they come online, they can read it.
Older versions can receive the messages, but cannot send offline
messages.
But they corrected a few things which you wish they didn't.
Firstly, by default, they will show your contact nicknames. Even
when you change it to show their email addresses, the next time you
sign in, it will be their nicknames again. You have to change it
all the time.
Secondly, the Send Files button is missing and is replaced by a
Sharing Files button. If you are behind a corporate firewall, you
can't click on the Sharing Files to send files. You now have to
click File, Send a single file.
Lastly, for those who can read their emails in Firefox (or other
browsers) when you click on the inbox button, you will be shocked
to find that you can't read your emails. IE won't even open it, so
you have to sign in manually.