Final update. CSS3 Light box plugin broke one of my post. It looks it conflicts with the included code reference inside the article, here you can see results: https://imgur.com/O9BKNMz

I have to say, that I do not use any plugin to include code. It is included after treatment with: http://www.elliotswan.com/postable/

After code citation block the rest of the article was without CSS formatting. For the comparison you can see real look at: http://mtomas.com/389/tiny-forge-framework-child-themes-comprehensive-guide

I'm very thankful for one reader who informed me about this. At the moment plugin feels like an early beta. Will stick with traditional JS solutions for the time being ;)