If you want to show recent posts from a particular category in sidebar.Probably easiest to make your own recent posts widget with one of Otto’s php code widgets http://wordpress.org/extend/plugins/php-code-widget/ and a new query:
<?php $my_query = new WP_Query('category_name=mycategory&showposts=1'); ?>
<?php while ($my_query->have_posts()) : $my_query->the_post(); ?>
<a href="<?php the_permalink() ?>" title="<?php the_title(); ?>">
<?php the_title(); ?></a>
<?php endwhile; ?>
Style it any way you want. The new query loop won’t conflict with the main WP loop and can be used any numbers of time.
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