This will probably require more in-depth testing, but a small addition to Search.inc.php seems to take care of excluding those dead links from search results (leaving them in and making a notation next to them looks to be *much* more complicated).
In _query_ni(), right after the '# Now search the links table' section that assembles the WHERE clause of the database query, add:
$query .= " AND DeadLink = '0'";
Dan
In _query_ni(), right after the '# Now search the links table' section that assembles the WHERE clause of the database query, add:
$query .= " AND DeadLink = '0'";
Dan