title: Box-shadow very slow scrolling (particularly - opera)
body: <p>I'm writing first time on this website, because I have big problem with css3 exactly box-shadow, so I start from the beginning  :)
  I made website and it worked good until I changed all graphic. 
  I did box-shadow and now my website works very slow (exactly scrolling).
  It is address: skuterpl.vot.pl (version with new graphic and box-shadow)
  strona.pzs1.pl (Old version with old graphic and without box-shadow, this website works very good).
  I'm asking you for help me with this problem.  </p>