Probably a dumb question but when I replicated my mail file to my machine why do I have white dots and blue dots in a new column in my inbox? I can’t find anywhere that can tell me what this new column is for?
Thx,
Matt
P.S. - I’m using R7 B3
Subject: Was that email sent to me?
http://www.alanlepofsky.net/alepofsky/alanblog.nsf/dx/was-that-email-sent-to-me
Subject: Blue Dot White Dot?
No dumb questions when you’re braving the Beta code! 
R7 has a new column in the Inbox which shows (by simply looking at the Inbox at not needing to open the email) if you are the only one listed in the To: field, one of many in the To: field, listed in the CC: field, etc.
The idea is that by having differently shaded circles, it will help you prioritize and find mail sent specifically to you so that you can get that mail read and replied to ASAP.
Hope that helps!