-webkit-linear-gradient causes banding in Chrome/Safari

Question

The title prettymuch says it all. The first picture below is a screenshot when the whole page is about 8000 pixels tall, taken in the latest version of Chrome:

Answer 1

Looks like a webkit bug. I came up with the work-around below, tested on the latest Chrome and FF. In short, you'll position a div containing the background behind your main content. I also added a few styles to make IE happier.

Given this HTML:

    


    
bgdiv
    

        
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Combined with this stylesheet:

    body{
        background-color: #f3ffff;
        min-height: 100%;
        margin:0px;
    }
    .background {
        height: 250px;
        left: 0;
        position: absolute;  /* could use fixed if you like. */
        right: 0;
        top: 0;
        z-index: -10;

        background-image:
            -webkit-linear-gradient(top,
                rgba(99, 173, 241, 1) 0px,
                rgba(0, 255, 255, 0) 250px
            );
        background-image:
            -moz-linear-gradient(top,
                rgba(99, 173, 241, 1) 0px,
                rgba(0, 255, 255, 0) 250px
            );
        background-image:
            -o-linear-gradient(top,
                rgba(99, 173, 241, 1) 0px,
                rgba(0, 255, 255, 0) 250px
            );
        background-image:
            -ms-linear-gradient(top,
                rgba(99,173,241,1) 0%,
                rgba(0,255,255,0) 250px
            ); /* IE10+ */
        filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#63adf1', endColorstr='#0000ffff',GradientType=0 ); /* IE6-9 */
        background-image:
            linear-gradient(top,
                rgba(99,173,241,1) 0%,
                rgba(0,255,255,0) 250px
            ); /* W3C */
        background-position: center top, center top;
        background-repeat: no-repeat, repeat-x;
    }
    .content_pane {
        background: white;
        border: 1px dotted white;
        border: 1px solid grey;
        font-family: arial, sans;
        font-weight: bold;
        margin: 6em auto 5em;
        width: 50%;
    }
    .titlebar {
        background: #3f7cdb;
        color: white;
        font-family: arial, sans;
        padding: .25em 2ex .25em;
    }
    .comment {
        padding: 1em;
    }

It should come out looking like this, regardless of window size: