Why are my png images displaying with a border on the iPad?

My png image looks fine on my website's homepage in IE, however on the iPad, there is a TOP, LEFT and bottom border displayin开发者_如何学Cg. Anyone know why?

Do you have a link on your image ? If yes try adding this to your CSS file :

a img{
    border-style:none;
}

That will hide the border.