Image caption and borders

I could not see the caption, and had to adapt the CSS;

try:

.wp-caption { position: relative; border: none; background: transparent; }
p.wp-caption-text {
position: absolute;
top: 20px;
text-align: right;
...etc...

to remove the padding around the image whihc causes the slight reduction in width of the captioned image, consider to add filter, as described in the caption shortcode:

/**
	 * Filter the width of an image's caption.
	 *
	 * By default, the caption is 10 pixels greater than the width of the image,
	 * to prevent post content from running up against a floated image.
	 *
	 * @since 3.7.0
	 *
	 * @see img_caption_shortcode()
	 *
	 * @param int    $caption_width Width of the caption in pixels. To remove this inline style,
	 *                              return zero.
	 * @param array  $atts          Attributes of the caption shortcode.
	 * @param string $content       The image element, possibly wrapped in a hyperlink.
	 */
	$caption_width = apply_filters( 'img_caption_shortcode_width', $caption_width, $atts, $content );

please ask the developer of your theme for help to implement that; http://codex.wordpress.org/Forum_Welcome#Commercial_Products