CSS3: box-shadow problem

Hello,
I have a problem on my website ( http://customizeopera.site90.com/home ).
I would like to make the shadow of the header be over the sidebar, is that possible?
Also, on Opera, the shadow under the header dissapear, I can't understand why.

Thanks

 

Which version of Opera do you use? I had a look with Opera 10.53 and it was fine.

 

I'm using 10.54, maybe that's the problem. I'll test out on 10.53, thanks.

EDIT: When I collapse the right sidebar, the problem appear clearly even on Opera 10.53.

 

These examples might help you:

cssfind.com/index.php?search=shadow&searchsubmit.x=0&searchsubmit.y=0