It's not you or your computer. When I logged in at around 8:15 a.m., the thread seemed to be there; but when I clicked on it, I got an "invalid thread" message. Ten minutes later, it was gone. As often happens on CC, and as I've never seen here, people started making nasty personal comments about each other. When that happens, the CC administrators remove the thread.
Too bad: it was interesting.
