To disable future image to show in your header :
<?php
// The header image
// Check if this is a post or page, if it has a thumbnail, and if it's a big one
if ( //promijenjeno da ne pokazuje futuered image u header is_singular() &&
//has_post_thumbnail( $post->ID ) &&
// ( /* $src, $width, $height */ $image = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), array( HEADER_IMAGE_WIDTH, HEADER_IMAGE_WIDTH ) ) ) &&
$image[1] >= HEADER_IMAGE_WIDTH ) :
// Houston, we have a new header image!
//echo get_the_post_thumbnail( $post->ID, 'post-thumbnail' );
else : ?>
comment line 88 if( // comment…
line 89,90 92 ,93
Hope it will help to somebody … header.php