perch blog custom not work after pagination clicked

Hi,

I am using perch_blog_custom like so:

$featured = perch_blog_custom(array(
    'filter' => 'featured',
    'match' => 'eq',
    'value' => '1',
    'skip-template' => 'true'
));

this works on the blog listing page but not after you have clicked a pagination link and a querystring is added to the URL

Any ideas why?

Ta