XF 1.2 position fixed won't work in chrome

[tafreehm]

Hello,
In new theme I have changed made two significant change. One I have added following css properties to HTML:

background-attachment: fixed;
z-index: -9;

and following to #moderatorBar

#moderatorBar{
    height: 28px;
    line-height: 22px;
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    z-index: 99;
    -moz-box-shadow: 0px 3px 5px #4d4b4d;
    -webkit-box-shadow: 0px 3px 5px #4d4b4d;
    box-shadow: 0px 3px 5px #4d4b4d;
}

Now, there are two issues on Chrome. One moderator bar does not float on top as it should. Second, membercard always jump to top of the page and you have to scroll up all the way to see it.

Can someone tell me what could did I miss.