Following this from the forums http://omeka.org/forums/topic/extra-page#post-116128 , they seem to be confused by the simple page title displaying when you get to it directly, but the title not displaying when it is set to the home page, and you are directly on the home page.
Is that intended behavior? I can see the logic of it -- that if it's the home page you don't want the breadcrumbs or the title, which would presumably be redundant. I'll point him to how to hack the plugin, but with release coming up I wanted to confirm this is how it should behave.