Hi there...
I've the same problem but: the suggest to modify the file index.php in this way
<?php if($this->countModules('slideshow')) : ?>
<div id="jf-slideshow">
<div class="main clearfix">
</div>
</div>
<?php endif; ?>
works only if you are using the slideshow module.
But in my case the slideshow module is turned off cause I'm leaving hust the main picture (banner.jpg) as full screen imagine, without text.
And with only one language website it's perfect (both: the main imagine and the effect which make the menu from transparant to dark scrolling with the mouse).
But if I start with the multilanguage function disappear both.
Now I tried to change the file index but it's work only if You leave the module "slidshow" on and it's works with no effect on the main menù (which remain already dark)
How may I fix it?
Thanks
Bye