[GilbertZ]

Although I'm still missing a good regexp for url validation that works w/ vb, I did fix everything else. Here's how. Modify your plugin to look like this:

PHP Code:

//Set error reporting to 0 so if fetching the rss fails you won't 
//mess up showthread.php. We'll reset it after we're done here.
error_reporting(0);

require_once '/path/to/magpie/rss_fetch.inc';
//fieldX needs to be replaced with the number of your custom profile field
if ($post['fieldX']){
$num_items = 1;

//fieldX needs to be replaced with the number of your custom profile field
$rss = fetch_rss($post['fieldX']);

//ONLY process the rss feed if you actually got one
if($rss)
{

$items = array_slice($rss->items, 0, $num_items);
foreach ( $items as $item ) {
$blogTitle = $item['title'];
$blogLink = $item['link'];
}
}
}
//reset error reporting
error_reporting(E_ALL & ~E_NOTICE);