Delete button at top does not work

This one:

uh-oh... it IS broken for me too!

It wasn't visibly working, but the little tab thing disappeared when I reloaded it, though.

this happened to me too, but I accidentally reloaded, so I didn't know what happened.

also, it's a close button

I pressed the delete button, it didn't go away at first, but then I went to go look a topic and it disappeared