Some CSS tweaks that make Yammer easier to use for me (and less like FB)

betteryammer.css

@namespace url(http://www.w3.org/1999/xhtml);

@-moz-document url-prefix("https://www.yammer.com/mozilla.com") {

    /*
     * Change header background
     * ========================
     *
     */

    #header-wrapper {
        background: url("https://assets1.yammer.com/images/yammer_bkgd-new.png") repeat-x scroll left top #F9F9F9 !important;
    }

    body {
        background: url("https://www.mozilla.org/images/template/background-paint.jpg") no-repeat scroll 0 30px #F9F9F9 !important;
    }

    #network-header {
        background-color: #000 !important;
        opacity: 0.7 !important;
    }

    /*
     * Remove the RHS sidebar on the home page
     * =======================================
     *
     * Hide useless divs and put the #online-now div in the LHS sidebar.
     *
     */

    #home-index .page-content {
        position: relative;
    }

    #home-index #column-two {
        width: 770px !important;
    }

    #home-index .three-column-layout .column {
        min-height: 0 !important;
    }

    #home-index #sidebar div {
        display: none;
    }

    #home-index .sidebar-suggestions {
        display: none !important;
    }

    #home-index #sidebar div#online-now {
        display: block !important;
        position: absolute;
        top: 600px;
        left: 5px;
        width: 160px;
        background-color: #fff;
    }

    /*
     * Hide the thread topics links
     * ============================
     *
     */

    .thread-replies-container .thread-topics {
        display: none !important;
    }

}