If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Of course, for "every Monday", the last one should have been dated July 22-28. *cough*
You might be confused because pressing the "back" button to a time when the message was unread will make the symbol turn read.
I've also had this effect by opening a bunch of tabs, with my inbox being the last one.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Of course, for "every Monday", the last one should have been dated July 22-28. *cough*