image aligement - center not working

Hi, I installed this template as a quickstart and modified the menu and text for my needs.

In articles I can not align the image to the center (text is ok).
Align the image to left or right is without any problems.

This is it: http://www.mrprint.sk/akcie

Hi,

You may find a trick here http://css-tricks.com/snippets/css/abso ... -an-image/