The Awesome Bar thinks it's awesome by remembering what you've typed in the past, and it does that well. But it doesn't really consider when maybe you're just lazy and typing in a URL that you know is going to redirect somewhere. While it may or may not take into account HTTP codes that indicate a redirect, it doesn't consider when HTTP Location: headers are used to redirect. Which means that when you go to, for example, http://phpmyadmin.net/, which always redirects using an HTTP Location: header to http://www.phpmyadmin.net/home_page/index.php, you never get the right Title or URL in the Awesome Bar drop-down. It's always your shorthand URL without a title at the top of the list. This also applies to *.sf.net addresses, which all redirect the same way to *.sourceforge.net.
For 301 redirects (permanent redirects), it's bug 426142. For 302/307 redirects (temporary) I'm not sure if this should happen.