If you find that clicking on any link takes you to the home screen, check to see whether you might be using a large transparent GIF or PNG for the site logo. If the image is large enough, it could be covering everything on the page and since it's transparent, it may not be obvious that it is there.
To disable the logo, use the Admin Overlay to navigate to the Theme Settings page (/admin/appearance/settings). You may need to use the tab key to navigate the page and the spacebar to enable or disable the logo.