White corner showing on black box with Border-radius

Question

I am getting a odd effect (currently in chrome). I have created my own overlay dialog box. which has a semi transparent background sitting on top of my website with a box on

Answer 1

Finally fixed this completely by adding this on parent and child divs.

-webkit-perspective: 1000;
-webkit-backface-visibility: hidden;
-webkit-transform: translate3d(0,0,0);
outline:none;
border:none;
text-decoration:none;