title: IE8 Rendering Bug: after javascript visibility-toggle, div content stays white
body: <p>The page here (<a href="http://skergeth.net/slidingfooter/" rel="nofollow noreferrer">http://skergeth.net/slidingfooter/</a>) contains a footer that slides up when you click on contact us. It then shows a contact form.</p>
  
  <p>However in IE8 it slides up and the div containing the form stays white until it is hovered by the mouse.
  I also tried the approach that the footer-div has overflow:hidden but since there are other elements inside the footer that should overflow (a menu that extends to the top), this is not an option.</p>
  
  <p>I don't think it is a javascript but because I tried to delay the transition and made sure, the setVisible is called before it but with the same result.</p>
  
  <p>I hope I made myself clear.</p>
  
  <p>Thanks for all your answers!</p>