the problem is with Pinboard theme displaying the social media icons stacked on top of each other in blog posts.
I do not see the problem with the twenty twelve theme. Furthermore, the icons are displayed perfectly OK on the site front page.
Problem persists with Safari, Chrome and Firefox.
I could not detect any difference between how Pinboard and Twenty Twelve are rendering them when I inspected with Chrome Developer Tools - yet I am very new at WordPress and I definitely miss something.
You can see the problem here: http://www.ozkanserin.com/2013/01/17/aperture-3-stop-importing-duplicates/ (see share this at the bottom of the page.
And no problem, here: http://www.ozkanserin.com
I will be glad of any help.