add this to theme option->custom css
#custom .wp-caption {box-shadow: none;background-color: transparent;}
#custom .wp-caption .wp-caption-text {padding: 10px;font-size: 11px;line-height: 15px;}
#custom .wp-caption .wp-caption-text:before {content: '';}
Awesome! thank you very much Richie.
But it make a large space in the bottom and side of the image, how to reduce the space? Screenshot: http://my.jetscreenshot.com/demo/20140815-yum8-117kb
Great help! The issue concerning distances between images and post’s text would interest me too.