Of course, dominic
If you had tried to update article http://proglas7.sk/nedus-sa-ruskom-a-dychaj/ and it appeared at frontpage, background changed according to article background.
I would like to keep backgr. image only in the article,
because it should apply to the article content and keep the frontpage image the same independently from new updates,
with updated article/post title and excerpt.
At present, if I want to add image as in http://proglas7.sk/nedus-sa-ruskom-a-dychaj/ to the newest article/post, the background on the frontpage will change. So far, I do not add image to the new post, 
or do edit post dates to keep an article with an image out of date. 