Please have a a look here
http://21.maidan.org.ua/
(site is in Ukrainian)
Sidebar with video somehow interferes with header of next widget - do you see the next widget's header background image (lightgrey rectangle with rounded corders at the bottom) sticking to tubepress widget?
The code for background
background: url('http://maidan.org.ua/design/2011/img/bxhd_bg300.jpg') no-repeat;was added via admin of Atahualpa theme.
I did not touch any tubepress or Atahualpa or wordpress files at all.
Please help me to resolve it. Unfortunately I am not that advanced in CSS to figure how to fix it myself :(
Best wishes
NZ