When using the TwentyTen theme it shows category excerpts only. To change this to full content you need to make the following change:
Find the “loop.php” file in your Theme, TwentyTen for me, search for “the_excerpt()” and replace it with “the_content()” in one place.
<?php if ( is_archive() || is_search() ) : // Only display excerpts for archives and search. ?>
<?php the_excerpt(); ?><!– CHANGE THIS TO “the_content()” –>
This appears to be working for me.