The way it's always worked for me, and continues to, is that 1 second
after selecting a message it's marked as read. I use the preview at
bottom layout, and that's where I read messages. It makes sense that
when I select a message and its content is displayed in the preview
pane, that MailMate
I don't use the preview pane, since I prefer to see each message in its
own window -- but I think what must have happened was that the preview
pane got accidentally opened to a height of like one pixel. I was
noticing some occasional what looked like display artifacts down there,
but I didn't
