Permanent "new" comment
 

Well, this sounds a bit weird, but a got a profile comment and now on the front page, even after I checked it, I've got a stuck reminder that I have a new comment. Its a bit annoying and I'm not sure yet if it'll disappear if I log out. I did click on it several times and even went to my profile directly through my name and it hasn't disappeared.

Another problem for the list.

Check the time on the comment. If it's from the future, it won't actually register as read until that time passes (this happens with forum topics as well).

I've had that; deleting comments seems to get rid of the banner.

That would explain it, it just disappeared when I rechecked now. **** time travelling.