Thanks Clyde! It's fixed. I've been waiting for this issue to be solved.

Here's my popup collections:
Code:
#popupShippingEstimator, #popupSearchHelp, #popupAdditionalImage, #popupImage, #popupCVVHelp, #popupCouponHelp, #popupAtrribsQuantityPricesHelp, #infoShoppingCart, #popupLinksHelp {
    background-color: #ffffff;
    background-image: none;
    }
I have to change all of these because of the dark background color.