When I opened my browser last night, Firefox installed an update. Immediately thereafter I went to my yahoo mail account and noticed that all my message looked bolded, like they were unread. I clicked on one to mark it as "read" and it looked no different. My gmail account has the same problem. I checked in Safari and everything looks fine. I will have to switch back to Safari I guess if this isn't fixed. It's very annoying because I get a lot of messages every day and want to know at a glance what is new.