Actually, since this update yesterday two problems - which had become a lot less frequent, but had been an issue when the system switched to Xenforo - have become more pronounced: The first is lagging, stalling, slowness. In practice, this has meant that I have had to shut down my wifi and re-open it - or exit MR and re-enter most of the time whenever I wished to post.
The second is duplicate posting - this happens because the system stalls, you press send again, and then, belatedly realise that the system had actually despatched your post the first time.
Actually, I have noticed that this issue is especially pronounced when you are replying to a post that already has an image attached.