I am getting the red envelope sign on the right side here, as I had a message. But then I see it's not for me. For a few days now.
Have you ever clicked on the grey envelope icon found at the bottom right of every post and comment? If you do, then immediate replies to it show up in your inbox also. Look at the parent of one of these mysterious messages and see if its envelope is green. If it is, you can click it again to turn it off.
Previous open thread
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one.
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.