"Add Media" button

I think problem is on your single.php file.
please attache your single.php file here.

text/x-generic single.php
PHP script text

<?php

get_header();

if (have_posts()) : while (have_posts()) : the_post();

?>

<!-- START #content -->

<div id="content">

	<div id="cross"><img src="<?php echo BP; ?>/images/cross.png" alt="" /></div>

	<h1 class="post_title"><?php the_title(); ?></h1>

	<div id="content_wrap">

		<div id="content_right">

			<div id="sidebar">

				<?php fw_sidebar($post->ID); ?>

			</div>

		</div>

		<div id="content_left">		

			<?php 

			if (has_post_thumbnail()) : 

			$image_id = get_post_thumbnail_id();
			$image_url = wp_get_attachment_image_src($image_id, 'paged_thumb');

			?>

			<div id="post_thumbnail">

				<a title="" href="<?php echo $image_url[0]; ?>" rel="prettyPhoto"><img src="<?php echo $image_url[0]; ?>" alt="" /></a>

			</div>

			<?php endif; ?>

			<div class="blog_post_meta">

				<ul>

					<li class="date"><?php the_time('F j, Y'); ?></li>
					<li class="author"><?php the_author_posts_link(); ?></li>
					<li class="category"><?php the_category(", "); ?></li>
					<?php if(has_tag()) : ?><li class="tag"><?php the_tags("",", ",""); ?></li><?php endif; ?>
					<li class="comments"><?php comments_popup_link(__("No Comments","village"), __("One Comment","village"), '% ' . __("Comments","village"), '', __("Comments Closed","village")); ?></li>

				</ul>

			</div>

			<?php 

			the_content(); 

			if (comments_open()) comments_template();

			?>

		</div>

		<div class="clear"></div>

	</div>

</div>

<!-- END #content -->

<?php 

endwhile; endif;

get_footer(); 

?>

I looked to this code, and it hasn’t any problem, i think your light box plugin make this problem, deactivate it and try another lightbox plugin.

I am having a similar problem. I press the add media botton and nothing happens. Currently I am using Brunelleschi as my theme. Any thoughts??

This problem was noted last month when I updated a bunch of plugins.

thank you.

Thanks Vahidd,

Will try deactivating the plugin tonight when I get home.

So I double checked that I had the latest version of the lightbox plus plugin, check.

As vahidd mentioned I deactivated this plugin, checked my blog post and the characters had gone. Check.

Re-activated the plugin, wrote a quick test post and no characters that I experienced before. Check.

Thanks for the quick response which pointed to answer.