Broken tag

Known from the blogging site Tumblr

If you track your own tag (e.g the same of your url)
and someone has tagged you in a post but then later removes the tag before you see it, then it will say that you have new posts in your tag when you don’t.

tumblr user: oh a new post!

tumblr user: uh another broken tag!!! I wonder what they said about me...