I fixed this by changing the function twitter_messages in the plugin to:
function twitter_messages($username = '', $num = 1, $list = false, $update = true, $linked = '#', $hyperlinks = true, $twitter_users = true, $encode_utf8 = false) {
global $twitter_options;
include_once(ABSPATH . WPINC . '/rss.php');
$rss= fetch_feed('http://api.twitter.com/1/statuses/user_timeline/'.$username.'.rss');
if ($list) echo '<ul class="twitter">';
if ($username == '') {
if ($list) echo '<li>';
echo 'RSS not configured';
if ($list) echo '</li>';
} else {
if ( is_wp_error($rss) ) {
if ($list) echo '<li>';
echo 'error retrieving feed';
if ($list) echo '</li>';
} else {
$messages = $rss->get_items(0, $num);
foreach ($messages as $message ) {
$msg = " ".substr(strstr($message->get_description(),': '), 2, strlen($message->get_description()))." ";
if($encode_utf8) {
$msg = utf8_encode($msg);
}
$link = $message->get_permalink();
if ($list)
echo '<li class="twitter-item">';
elseif ($num != 1)
echo '<p class="twitter-message">';
if ($hyperlinks) {
$msg = hyperlinks($msg);
}
if ($twitter_users) {
$msg = twitter_users($msg);
}
if ($linked != '' || $linked != false) {
if($linked == 'all') {
$msg = '<a href="'.$link.'" class="twitter-link">'.$msg.'</a>'; // Puts a link to the status of each tweet
} else {
$msg = $msg . '<a href="'.$link.'" class="twitter-link">'.$linked.'</a>'; // Puts a link to the status of each tweet
}
}
echo $msg;
if($update) {
$time = strtotime($message['pubdate']);
if ( ( abs( time() - $time) ) < 86400 ) {
$h_time = sprintf( __('%s ago'), human_time_diff( $time ) );
}
else {
$h_time = date(__('Y/m/d'), $time);
}
echo sprintf( __('%s', 'twitter-for-wordpress'),' <span class="twitter-timestamp"><abbr title="' . date(__('Y/m/d H:i:s'), $time) . '">' . $h_time . '</abbr></span>' );
}
if ($list) echo '</li>'; elseif ($num != 1) echo '</p>';
} /* end foreach*/
} /* close else */
}
if ($list) echo '</ul>';
}
I took the chance to fix the problem of it using a deprecated wordpress function by also changing the plugin to use fetch_feed
