Thanks for the reply. I figured it out. The problem arose because of the PLACEMENT of the tag required for this. Here is the tag (which I have set to display just posts from category 10 on my index page:
<?php if ( in_category(’10’) ): ?>
And here is where it should be placed in relation to The Loop:
<?php get_header(); ?>
<!– content …………………………… –>
<div id=”content”>
<?php if (have_posts()) : ?>
<?php while (have_posts()) : the_post(); ?>
<?php if ( in_category(’10’) ): ?>
<hr class=”low” />
<div class=”entry”>
<h2>” title=”Permalink”><?php the_title(); ?></h2>
<?php ($post->post_excerpt != “”)? the_excerpt() : the_content(); ?>
</div>
<?php endif; ?>
<?php endwhile; ?>
<?php else : ?>
<h2>Not Found</h2>
Sorry, but you are looking for something that isn’t here.
<?php endif; ?>
</div>
<!– /content –>
<?php get_sidebar(); ?>
<?php get_footer(); ?>