OK I am really stumped... I have added the <?php the_post_thumbnail( 'thumbnail' ); ?> to my loop below in my TwentyTen Child Theme, however thumbnails only show on my blog page, and not in specific categories, or archived categories. Also, I want the thumbnail to show on the left side of the post so that there is a cleaner look. Can someone help me get this to work properly?
<?php /* How to display all other posts. */ ?>
<?php else : ?>
<div id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
<h2 class="entry-title">" title="<?php printf( esc_attr__( 'Permalink to %s', 'twentyten' ), the_title_attribute( 'echo=0' ) ); ?>" rel="bookmark"><?php the_title(); ?></h2>
<div class="entry-meta">
<?php twentyten_posted_on(); ?>
</div><!-- .entry-meta -->
<?php if ( is_archive() || is_search() ) : // Only display excerpts for archives and search. ?>
<div class="entry-summary">
<?php the_post_thumbnail( 'thumbnail' ); ?>
<?php the_excerpt(); ?>
</div><!-- .entry-summary -->
<?php else : ?>
<div class="entry-content">
<?php the_post_thumbnail( 'thumbnail' ); ?>
<?php the_excerpt( __( 'Continue reading <span class="meta-nav">→</span>', 'twentyten' ) ); ?>
<?php wp_link_pages( array( 'before' => '<div class="page-link">' . __( 'Pages:', 'twentyten' ), 'after' => '</div>' ) ); ?>
</div><!-- .entry-content -->
<?php endif; ?>