Wordpress help required in functions.php

I am getting the following errors as notified by my theme dashboard. Please help me in this regard. The thing is related to RSS. I was using feedburner but have switched to the default RSS link, thinking that was the culprit. However, I have no idea why I am getting this error. Everything on the site was just working fine, the infolinks, adsense, tynt, etc. However, since the past few days, I am unable to see any infolinks on my site, though the correct code has already been added. Please help.

My site is: www.thetechnofreaks.com
Following are the errors. Please look into them.

Warning: array_slice() expects parameter 1 to be array, null given in /ZZZ/ZZZ/public_html/wp-content/themes/techblog-single-pro-psd/functions.php on line 827

Warning: Invalid argument supplied for foreach() in /ZZZ/ZZZ/public_html/wp-content/themes/techblog-single-pro-psd/functions.php on line 829

FROM functions.php line 827 onwards:

   $rss->items = array_slice($rss->items, 0, 6);    
$channel = $rss->channel;    
       foreach ($rss->items as $item ) {        
       $parsed_url = parse_url(wp_filter_kses($item['link']));        
       echo "<li><b><a href=" . wp_filter_kses($item['link']) . ">" . wptexturize(wp_specialchars($item['title'])) . "</a></b></li>";
}    
echo "</ul>";  }    ?>

PHP:

 

It look like rss is not returning Anything hence you get the errors