Lucas Flávio

Screenshots:

Plugin Check: https://i.imgur.com/Bi0Yu.png
Thumbnails dialog gets blank: https://i.imgur.com/xDVSF.png

Already tried to increase memory limit, but it seems that is not the problem.

Exactly the same problem here. What should we do? Downgrade to WordPress 3.2 and NextGen 1.8.0?

When running Plugin Check, I get this:

V Check plugin/theme conflict
No conflict could be detected

X Test image function
Couldn't create image, check your memory limit

V Check theme compatibility
Your theme should work fine with NextGEN Gallery

My comments.php:

<?php // Do not delete these lines
	if ('comments.php' == basename($_SERVER['SCRIPT_FILENAME']))
		die ('Please do not load this page directly. Thanks!');

	if (!empty($post->post_password)) { // if there's a password
		if ($_COOKIE['wp-postpass_' . COOKIEHASH] != $post->post_password) {  // and it doesn't match the cookie
			?>

			<p class="nocomments">Este post é protegido. Coloque a senha para ver o conteúdo.<p>

			<?php
			return;
		}
	}

	/* This variable is for alternating comment background */
	$oddcomment = 'alt';
?>

<!-- You can start editing here. -->

<div id="commentblock">
<?php if ($comments) : ?>
	<p id="comments"><b><?php comments_number('Sem respostas', '1 Resposta', '% Respostas' );?> em “<?php the_title(); ?>”</b></p>

	<ol class="commentlist">

	<?php foreach ($comments as $comment) : ?>
<?php $comment_type = get_comment_type(); ?>
<?php if($comment_type == 'comment') { ?>

		<li class="<?php echo $oddcomment; ?>" id="comment-<?php comment_ID() ?>">
			<b><?php comment_author_link() ?></b> em
			<?php if ($comment->comment_approved == '0') : ?>
			<em>Seu comentário será aprovado em breve.</em>
			<?php endif; ?>
			<?php comment_date('d/m/Y') ?> às <?php comment_time('G:i') ?> <?php edit_comment_link('(Editar)','',''); ?>

			<div class="commenttext">
			<?php comment_text() ?>
			</div>

		</li>

	<?php /* Changes every other comment to a different class */
		if ('alt' == $oddcomment) $oddcomment = '';
		else $oddcomment = 'alt';
	?>
<?php } else { $trackback = true; } /* End of is_comment statement */ ?>
	<?php endforeach; /* end for each comment */ ?>

	</ol>
<?php if ($trackback == true) { ?>
<h3>Trackbacks</h3>
</br>
<ol>
<?php foreach ($comments as $comment) : ?>
<?php $comment_type = get_comment_type(); ?>
<?php if($comment_type != 'comment') { ?>
<li><?php comment_author_link() ?><br /><?php comment_date('d/m/Y') ?> às <?php comment_time('G:i') ?></li>
<?php } ?>
<?php endforeach; ?>
</ol>
<?php } ?>
 <?php else : // this is displayed if there are no comments so far ?>

	<?php if ('open' == $post->comment_status) : ?>
		<!-- If comments are open, but there are no comments. -->
	 <?php else : // comments are closed ?>
		<!-- If comments are closed. -->
		<p class="nocomments">Comentários est?o fechados.</p></div>

	<?php endif; ?>
<?php endif; ?>

<?php if ('open' == $post->comment_status) : ?>

<p id="respond"><b>Deixe um comentário!</b></p>

<?php if ( get_option('comment_registration') && !$user_ID ) : ?>
<p>You must be <a href="<?php echo get_option('siteurl'); ?>/wp-login.php?redirect_to=<?php the_permalink(); ?>">Fa?a log-in</a> para fazer comentários.</p></div>
<?php else : ?>

<form action="<?php echo get_option('siteurl'); ?>/wp-comments-post.php" method="post" id="commentform">

<?php if ( $user_ID ) : ?>

<p>Logado como <a href="<?php echo get_option('siteurl'); ?>/wp-admin/profile.php"><?php echo $user_identity; ?></a>. <a href="<?php echo get_option('siteurl'); ?>/wp-login.php?action=logout" title="Log out of this account">Logout &raquo;</a></p>

<?php else : ?>

<p><label for="author">Nome <?php if ($req) echo "(obrigatório)"; ?></label><br />
<input type="text" name="author" id="author" value="<?php echo $comment_author; ?>" size="40" tabindex="1" /></p>

<p><label for="email">Email <?php if ($req) echo "(n?o será publicado)"; ?></label><br />
<input type="text" name="email" id="email" value="<?php echo $comment_author_email; ?>" size="40" tabindex="2" /></p>

<p><label for="url">Site <?php if ($req) echo "(opcional)"; ?></label><br />
<input type="text" name="url" id="url" value="<?php echo $comment_author_url; ?>" size="40" tabindex="3" /></p>

<?php endif; ?>

<!--<p><small><strong>XHTML:</strong> You can use these tags: <?php echo allowed_tags(); ?></small></p>-->

<p><textarea name="comment" id="comment" cols="53" rows="10" tabindex="4"></textarea></p>

<p><input name="submit" type="submit" id="submit" tabindex="5" value="Enviar comentário" />
<input type="hidden" name="comment_post_ID" value="<?php echo $id; ?>" /></p>

<?php do_action('comment_form', $post->ID); ?>

</form>
</div>

<?php endif; // If registration required and not logged in ?>

<?php endif; // if you delete this the sky will fall on your head ?>

Im not using plugin WP Super Cache. :/