>>5
The only thing I've ever seen on /b/ is the old blank page with "MY_SQL connection failure" at the top (though I haven't been on /b/ for a get in about six months). This isn't the same as that. This is where you get the usual "The thread specified does not exist" page that you normally get when replying to a deleted thread, but in this case the thread still exists. You can usually hit "back" and re-submit and the post goes through.
This problem is also a MY_SQL problem, apparently, but as I said above, it seems fairly new. I had never encountered it until maybe two weeks ago, and everyone I've talked to about it said they thought it was at most a month or two old.
I posted about it here partly because I was curious about how widespread it is (e.g., whether it's affecting all the servers or just zip - which is where I've run into it - and whether it was even on 4chan's side), and partly because I know moot reads /img/ fairly regularly and because I figured he's probably snowed under with e-mail about the /a/ vs. /jp/ shitstorm at the moment. It's nothing urgent, and I figure he's probably already aware of it, but I wanted to make sure it wasn't a network problem or something on the client side because nobody was really talking about it much on the boards until I brought it up.