shadow overlay on image

Hello
Im using storefront and K2 as showing items.
When at a product the main picture looks good but on mouse over it comes twice as big shadow over the screen. How do I get rid of the overlay and just have a normal mouse over without an effect?
thanks.

Hi,
1) we talk about K2 item view or view from the module?
2) Show us URL, without hard to guess.

Thanks for the reply, sorry for the lack of information.
here is the page. Its K2 and on mouse over a dark schadow, preview box appears.
http://gastrotopcard.se/index.php/compo ... fix-medici

Try this one:

.gkImageWrapperOverlayWrap:hover .gkImageWrapperOverlay > span > span {background: transparent !important;}

Works great - thank you very much