The pager_link function ommits the &type argument

When you use the node type filter there is a major problem in the pager_link function :
the links to first, previous ... pages ignores the "&type=" argument.

you can fix it by modifying the pager.inc page:

in the function pager_link on line 383 :

replace the line

function pager_link($from_new, $element, $attributes = array()) {
$q = $_GET['q'];

with :

function pager_link($from_new, $element, $attributes = array()) {
$q = $_GET['q'].(($_GET[type])? '&type='.$_GET[type]:'');