I have a problem with my wp theme. It worked fine until now. When I try to make a new post and I upload featured image, which is (in original size) 600x260, WP 'forces' the image size and adds something like this at the end of image url:
<img width="75" height="75" src="http://www.sitename.com/wp-content/uploads/2014/02/post_thumbnail-75x75.png" class="attachment-post-thumbnail wp-post-image" alt="post_thumbnail">
I'm not sure why it automatically resizes the image to this 75x75 - it wasn't like this before. How to change it, so WordPress doesn't add this "-75x75"?
