Getting Error in WP

One of my friend getting the following error in Wordpress blog at trendztime.com:

Warning: implode() [function.implode]: Invalid arguments passed in /home/urcric/public_html/trendztime.com/wp-content/themes/ZPRESS/functions/wpzoom-widgets.php on line 1450

Following text in Red is line 1450:

if ($type == 'tag')
{
$postsq = $slugs;
}
elseif ($type == 'cat')
{
$postsq = implode(",",$category);
}


/* Before widget (defined by themes). */
//echo $before_widget;
?>

Here is a screen shot of error:

 

I think there is a problem with the theme. Have you tried changing it?

 

I think there is a problem with the theme. If you want to skip this error just add the @ sign before the implode function. e.g:

{
$postsq = @implode(",",$category);
}