Lost Important Functionality Not yet rated
Stunned by the change to the UI. The "Today view" is now docked on the right with no apparent way to change it's location. But worst of all is that I lost my mini-calendar on the left-hand side and now have to completely change screens to get any calendar.
I'm a huge supporter of both Lightning and Thunderbird, but the 0.7 update to Lightning is appalling. As soon as I figure out how to do it, I'm rolling back to the previous version of Lightning as I cannot use the new version. I DO NOT RECOMMEND THIS UPDATE.