I'm using the Twenty Ten theme - it displays a 'Home' link even when no other pages exist. I created a static page called Home, added content, added the page to my Menu, trashed the default Home from the menu & dragged 'my' homepage into it's place. But the default page is the one that remains visible on my site - I have to open Home on the menu to see my content.
I've found an explanation - I now have two links going to the same location, & am advised to do this: "If the theme you’re using doesn’t display child pages in the pages menu, you can hide the second link by editing the page and setting another page as the Parent in the Attributes module" as the solution." But since I trashed that page I can't edit it. My new page has only the '(no parent)' option, no 'Main Page (no parent)'.