I just realized that when you have trackbacks from other sites that don’t have a <title> tag (Phil, I’m looking at you), they show up as a blank link in the ‘Incoming Links’ dashboard. So I fixed it. This diff should be run against your /wp-admin/index-extra.php file.
I figure I should tell you what it does before I have people blindly changing some administrative files. All it does is check for a blank title from your incoming links feed and if it finds one, instead of doing the default (which prints a link with no link text), it just puts the URL of the incoming link as the link text.