If you happen to use the Blogroll Autolinker along with BirdFeederWP, you’ll probably notice something bad like this show up in your feeds:

WordPress database error: [You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE 1=1 AND link_visible = 'Y' ORDER BY link_name ASC' at line 1]
SELECT * , IF (DATE_ADD(link_updated, INTERVAL 120 MINUTE) >= NOW(), 1,0) as recently_updated FROM WHERE 1=1 AND link_visible = 'Y' ORDER BY link_name ASC

I did, anyway. It turns out it’s because BirdFeederWP needs to reestablish the connection to the WordPress database, and it does so in a way that wipes out all the $wpdb->table_name variables that WordPress uses internally to refer to its database tables. So when the Blogroll Autolinker calls a function to get all your links from the database, it can’t because it doesn’t know what the links table is called! I contacted the author of the plugin about that, and in the meantime I think you can fix the problem by copying the following code into BirdFeederWP.php just after line 113:

$wpdb->prefix = $table_prefix;
if ( preg_match('|[^a-z0-9_]|i', $wpdb->prefix) && !file_exists(ABSPATH . 'wp-content/db.php') )
    wp_die("<strong>ERROR</strong>: <code>$table_prefix</code> in <code>wp-config.php</code> can only contain numbers, letters, and underscores.");
$wpdb->posts          = $wpdb->prefix . 'posts';
$wpdb->users          = $wpdb->prefix . 'users';
$wpdb->categories     = $wpdb->prefix . 'categories';
$wpdb->post2cat       = $wpdb->prefix . 'post2cat';
$wpdb->comments       = $wpdb->prefix . 'comments';
$wpdb->link2cat       = $wpdb->prefix . 'link2cat';
$wpdb->links          = $wpdb->prefix . 'links';
$wpdb->options        = $wpdb->prefix . 'options';
$wpdb->postmeta       = $wpdb->prefix . 'postmeta';
$wpdb->usermeta       = $wpdb->prefix . 'usermeta';
$wpdb->terms          = $wpdb->prefix . 'terms';
$wpdb->term_taxonomy  = $wpdb->prefix . 'term_taxonomy';
$wpdb->term_relationships = $wpdb->prefix . 'term_relationships';
if ( defined('CUSTOM_USER_TABLE') )
    $wpdb->users = CUSTOM_USER_TABLE;
if ( defined('CUSTOM_USER_META_TABLE') )
    $wpdb->usermeta = CUSTOM_USER_META_TABLE;

Then find line 111 and change it so it looks like this:

global $wpdb, $table_prefix;

This worked for me, at least.