But I have a lot of categories and I don't want the latest posts of just one category on the homepage.
And there was a second problem: the category tabs didn't work because of a javascript conflict after adding Feature List. Thus it was also necessary.

An easier way is just specifying one category (not 6) on the theme options page ;-)

Google provided me the solution

<?php $paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
query_posts('showposts=5&paged='.$paged); ?>

This should be added in front of the code in my previous post. And the number 5 can be changed.

I would like to delete the tab/category switcher with the latest posts. I want one list with latest post.
I've tried it with deleting everything between and including < div id="tabs"> < /div> and replace that with the following code:

<?php while (have_posts()) : the_post(); ?>
	<div class="post">

	<?php include("firstimage.php"); ?>
	<?php include("thumbnail.php"); ?>

	<h2 class="posttitle">
	<a href="<?php the_permalink() ?>" rel="bookmark" title="<?php the_title_attribute(); ?>"><?php the_title(); ?></a>
	</h2>
	<small><?php the_time('d/m/Y') ?></small>

	<p class="sample">
		< ?php the_content_rss('', TRUE, '', 33); ?>
		<a class="continue" href="<?php the_permalink() ?>">Lees verder »</a>
	</p>

        <div class="clear">< /div>
	</div>< !--end post-->

<?php endwhile; ?>

It's not perfect yet; I need to style it because now the classes are changed, but I think I can solve that. The problem is: How can I code a maximum of visible latest posts on the homepage. I don't want a list of all the posts.

Kind regards