@kjharcombe: I may have uncovered a bug: I no longer seem to be able to move posts.
A user created a new topic instead of adding to the current one (is that itself a bug with the email interface?) I went to move it into the existing thread, but while I could select posts, I could not move out of the “Select posts” interface except by cancelling it. I haven’t done this very often, but I’m pretty sure that on some selection confirmation I used to be presented with a choice of things to do, including Move Posts. I don’t see that now.