Yeah, they are still happening. I'm getting the feeling from it that at least one of the servers is offline and it's hit or miss on which server you get each time you reload the site. Sometimes it works, sometimes it doesn't.
I've been getting these errors too but it's been for longer than just today. I'll be keeping track of this thread to hear what the wise Chops has to say about it.
Thanks guys. It turns out that the patch that I was deploying this morning caused some replication issues. The servers are bringing themselves back online now, and the issues should sort themselves out in about an hour or so.