Imagem destacada – Post

Estou com um problema na configuração da imagem destacada no post.

Meu tema é o Lucid do Elegant themes.

A imagem fica sempre cortada em 180 x 180.

Ja tentei alterar o add_image_size, como indicam em outros tópicos, mas nada resolve.

O código é o seguinte:

<?php
add_theme_support( ‘post-thumbnails’ );

$et_theme_image_sizes = array(
‘630×210’ => ‘et-blog-thumb’,
‘960×360’ => ‘et-featured-thumb’,
’37×37′ => ‘et-widget-fromblog-thumb’,
‘136×77’ => ‘et-video-slider-thumb’,
‘300×300’ => ‘et-home-image-thumb’,
);

$et_page_templates_image_sizes = array(
‘500×600’ => ‘et-blog-page-thumb’,
‘207×136’ => ‘et-gallery-page-thumb’,
‘260×170’ => ‘et-portfolio-medium-page-thumb’,
‘260×315’ => ‘et-portfolio-medium-portrait-page-thumb’,
‘140×94’ => ‘et-portfolio-small-page-thumb’,
‘140×170’ => ‘et-portfolio-small-portrait-page-thumb’,
‘430×283’ => ‘et-portfolio-large-page-thumb’,
‘430×860’ => ‘et-portfolio-large-portrait-page-thumb’,
);

$et_theme_image_sizes = array_merge( $et_theme_image_sizes, $et_page_templates_image_sizes );

$et_theme_image_sizes = apply_filters( ‘et_theme_image_sizes’, $et_theme_image_sizes );
$crop = apply_filters( ‘et_post_thumbnails_crop’, true );

if ( is_array( $et_theme_image_sizes ) ){
foreach ( $et_theme_image_sizes as $image_size_dimensions => $image_size_name ){
$dimensions = explode( ‘500×600’, $image_size_dimensions );
add_image_size( ‘et-blog-thumb’, 400, 400);

}
}
?>