I am currently using WPMU2.8.4a and I have created an aggregation page template that is currently used by the default root domain as its 'static' page upon loading.
SO you visit http://www.bleah.com and you get the aggro page. Inside this page template I am pulling 5 posts from each of my 18 sub-sites (blogs within WPMU same install).
I was using the following code before without fail, in terms of it properly pulling the posts. However, now for whatever reason it only pulls the first post and permalink, then for every additional post it outputs the correct title, but doesn't pull the permalink:
<?php
switch_to_blog(#BLOG_ID);
$args=array(
'showposts'=>5,
);
$new_loop = new WP_Query($args);
query_posts('');
start_wp();
if($new_loop->have_posts()) {
while($new_loop->have_posts()) {
$new_loop->the_post(); ?>
<li><a href="<?php the_permalink(); ?>"><span class="date"><?php the_time('m/j/Y'); ?></span> - <?php the_title(); ?></a></li>
<?php } } restore_current_blog(); ?>