Is anyone else upset about the new Comcast email set up? I don't care for it at all. Instead of it showing in bold, the emails I haven't dealt with can't readily be identified. There are other things I don't care for either. What was wrong with the way is has been set up for years?
Try clearing out your browser's cache/browsing history. When you have done that, close out the browser and re-start it in a fresh session. If that doesn't do it, then try using a different browser. See if either of those fixes it.