Issue 1: When using the scroll bar to browse the list of emails, it skips one email (advances too much), so when searching I sometimes cannot find that email. I tried resizing the list of emails to try to match the vertical size, but it does not seem to help. Issue 2: I cannot customize the vertical size for the list of emails. It won't accept reducing less than about one third of the vertical size of the thunderbird window. Issue 3: In between the list of emails and the display of the current email content, there is a large area that I find redundant. The 'From', 'To', 'Subject', 'Date' is redundant since the list of emails already show all this information. I cannot find a way to remove, minimize or compact this region. Even the list of buttons could be removed in my case since I mainly use shortcuts and anyway, they are available in the menu or when you right click on an email.