Created attachment 415754 [details]
Test

The attached test is simply a <div> and this style:

    div {
        background-color: blue;
        position: absolute;
        left: 0;
        top: 0;
        height: 100%;
        width: 100%;
    }

    div:hover {
        height: auto;
    }

When I move the cursor around the page the page flashes blue, as if the <div> stopped painting. This does not occur in either Firefox or Chrome.