If I turn on Enable Composite Files, the admin menu instead of being horizontal at top and taking about 24 px high, is vertical and takes about 700 px high. It is extremely hard to select anything when it is vertical. I notice that the admin | controlpanel | module.css has this before being combined/minimized:
#dnnCPWrap {
    background: -moz-linear-gradient(center top , #F3F3F3 0%, #CFCFCF 100%) repeat scroll 0 0 transparent;
    border: 1px solid #999999;
    left: 0;
    padding: 6px 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 10000;
}
and after:
/* Default Over-rides */
#ControlPanelWrapper #dnnCPWrap        { filter:none !important;}
How do i troubleshoot and fix this problem. I have not modified module.css, this is standard from installation.
BTW, DNN guys, I wanted to search forums for answer, but search returns a 404 error after you enter search term and hit enter.