If I'm missing something really obvious, chalk it up to the fact that I've been working on various site stuff all day.
On this page:
you can sign up for my newsletter. I do indeed have a page that should be shown when you are successfully subscribed:
but that's not what is happening, even though the variables are there, according to:
Help! I don't want the very bland page! I'm sure it's something simple, but all the code seems right...