Pane-Menu-Tree in Screen.css rendering differently due to differences in Comass Radix Gem and Ruby Gem Versions?

I am trying to get .pane-menu-tree working on Radix Starter and Sizzle based sub-themes/themes of Radix

basically I want the table display for sub-menu's on panels and not the tree list with bullet points

vs

I think what it comes down to is that my environment is different to the developing environment for Sizzle and Chef and so that when I compile the SASS with my version I am not getting the same CSS from _menu.scss

the weird thing is, that I am running an older version of Ruby and a newer version of Compass Radix

my environment, the same file compiles differently /sites/all/themes/sizzle/assets/stylesheets/screen.css
gems/1.8
compass_radix-0.0.12

from the screen.css downloaded from http://drupalcode.org/project/sizzle.git/blob/HEAD:/assets/stylesheets/s...
compass_radix-0.0.7
ruby-1.9.3-p194
ruby-1.9.3-p194/gems/compass_radix-0.0.7/stylesheets/compass_radix/_menu.scss

my environment, based on standard Radix Handbook instructions http://drupal.org/node/1896382

the CSS downloaded from git.drupal.org for /sizzle/assets/stylesheets/screen.css

/* line 124, ../../../../../../../../../../usr/local/.rvm/gems/ruby-1.9.3-p194/gems/compass_radix-0.0.7/stylesheets/compass_radix/_menu.scss */
.pane-menu-tree {
  padding: 0;c
  background-color: #fff;
  margin: 0 0 30px;
  -webkit-border-radius: 6px;
  -moz-border-radius: 6px;
  border-radius: 6px;
  -webkit-box-shadow: 0 1px 4px rgba(0, 0, 0, 0.065);
  -moz-box-shadow: 0 1px 4px rgba(0, 0, 0, 0.065);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.065); }
  /* line 130, ../../../../../../../../../../usr/local/.rvm/gems/ruby-1.9.3-p194/gems/compass_radix-0.0.7/stylesheets/compass_radix/_menu.scss */
  .pane-menu-tree .pane-title {
    padding: 8px 14px;
    margin: 0 0 -1px;
    border: 1px solid #e5e5e5; }
  /* line 136, ../../../../../../../../../../usr/local/.rvm/gems/ruby-1.9.3-p194/gems/compass_radix-0.0.7/stylesheets/compass_radix/_menu.scss */
  .pane-menu-tree .pane-content ul.menu {
    margin: 0;
    padding: 0; }
    /* line 139, ../../../../../../../../../../usr/local/.rvm/gems/ruby-1.9.3-p194/gems/compass_radix-0.0.7/stylesheets/compass_radix/_menu.scss */
    .pane-menu-tree .pane-content ul.menu li {
      list-style: none outside none;
      margin: 0;
      padding: 0; }
      /* line 143, ../../../../../../../../../../usr/local/.rvm/gems/ruby-1.9.3-p194/gems/compass_radix-0.0.7/stylesheets/compass_radix/_menu.scss */
      .pane-menu-tree .pane-content ul.menu li a {
        display: block;
        margin: 0 0 -1px;
        padding: 8px 14px;
        border: 1px solid #e5e5e5; }
        /* line 148, ../../../../../../../../../../usr/local/.rvm/gems/ruby-1.9.3-p194/gems/compass_radix-0.0.7/stylesheets/compass_radix/_menu.scss */
        .pane-menu-tree .pane-content ul.menu li a:hover {
          background-color: #f5f5f5;
          text-decoration: none; }
      /* line 154, ../../../../../../../../../../usr/local/.rvm/gems/ruby-1.9.3-p194/gems/compass_radix-0.0.7/stylesheets/compass_radix/_menu.scss */
      .pane-menu-tree .pane-content ul.menu li.active-trail > a {
        color: #ffffff;
        text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.2);
        background-color: #0088cc; }
      /* line 159, ../../../../../../../../../../usr/local/.rvm/gems/ruby-1.9.3-p194/gems/compass_radix-0.0.7/stylesheets/compass_radix/_menu.scss */
      .pane-menu-tree .pane-content ul.menu li.active-trail > ul.menu {
        display: block; }
        /* line 162, ../../../../../../../../../../usr/local/.rvm/gems/ruby-1.9.3-p194/gems/compass_radix-0.0.7/stylesheets/compass_radix/_menu.scss */
        .pane-menu-tree .pane-content ul.menu li.active-trail > ul.menu li a {
          padding-left: 30px; }
        /* line 166, ../../../../../../../../../../usr/local/.rvm/gems/ruby-1.9.3-p194/gems/compass_radix-0.0.7/stylesheets/compass_radix/_menu.scss */
        .pane-menu-tree .pane-content ul.menu li.active-trail > ul.menu li.active-trail > a {
          background-color: #F5F5F5;
          color: #0088CC;
          text-shadow: none; }
    /* line 176, ../../../../../../../../../../usr/local/.rvm/gems/ruby-1.9.3-p194/gems/compass_radix-0.0.7/stylesheets/compass_radix/_menu.scss */
    .pane-menu-tree .pane-content ul.menu ul.menu {
      display: none; }

and in my environment, the same file compiles differently /sites/all/themes/sizzle/assets/stylesheets/screen.css
gems/1.8
compass_radix-0.0.12

/* line 125, ../../../../../../../../../../var/lib/gems/1.8/gems/compass_radix-0.0.12/stylesheets/compass_radix/_menu.scss */
.navbar-inverse {
  color: #999999; }
  /* line 130, ../../../../../../../../../../var/lib/gems/1.8/gems/compass_radix-0.0.12/stylesheets/compass_radix/_menu.scss */
  .navbar-inverse #main-menu > ul.menu > li > a {
    color: #999999;
    text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.25);
    text-align: center; }
    /* line 134, ../../../../../../../../../../var/lib/gems/1.8/gems/compass_radix-0.0.12/stylesheets/compass_radix/_menu.scss */
    .navbar-inverse #main-menu > ul.menu > li > a:hover {
      color: white;
      background-color: transparent; }
    /* line 138, ../../../../../../../../../../var/lib/gems/1.8/gems/compass_radix-0.0.12/stylesheets/compass_radix/_menu.scss */
    .navbar-inverse #main-menu > ul.menu > li > a.active {
      color: white;
      background-color: #111111; }
  /* line 144, ../../../../../../../../../../var/lib/gems/1.8/gems/compass_radix-0.0.12/stylesheets/compass_radix/_menu.scss */
  .navbar-inverse #main-menu > ul.menu > li.open > a {
    background-color: #111111;
    color: white; }

/* line 156, ../../../../../../../../../../var/lib/gems/1.8/gems/compass_radix-0.0.12/stylesheets/compass_radix/_menu.scss */
.navbar-fixed-top {
  margin-top: 0 !important; }
  /* line 158, ../../../../../../../../../../var/lib/gems/1.8/gems/compass_radix-0.0.12/stylesheets/compass_radix/_menu.scss */
  .navbar-fixed-top .container {
    width: 940px; }

/* line 165, ../../../../../../../../../../var/lib/gems/1.8/gems/compass_radix-0.0.12/stylesheets/compass_radix/_menu.scss */
#footer-menu {
  background-color: #eeeeee;
  -webkit-border-radius: 4px;
  -moz-border-radius: 4px;
  border-radius: 4px;
  margin: 0 0 20px;
  padding: 20px; }
  /* line 170, ../../../../../../../../../../var/lib/gems/1.8/gems/compass_radix-0.0.12/stylesheets/compass_radix/_menu.scss */
  #footer-menu > ul.menu {
    margin: 0;
    padding: 0;
    overflow: hidden;
    *zoom: 1; }
    /* line 174, ../../../../../../../../../../var/lib/gems/1.8/gems/compass_radix-0.0.12/stylesheets/compass_radix/_menu.scss */
    #footer-menu > ul.menu > li {
      float: left;
      list-style: none outside none;
      margin: 0 0 20px;
      padding: 0;
      width: 20%; }
      /* line 181, ../../../../../../../../../../var/lib/gems/1.8/gems/compass_radix-0.0.12/stylesheets/compass_radix/_menu.scss */
      #footer-menu > ul.menu > li > a,
      #footer-menu > ul.menu > li > span {
        font-size: 1.0em;
        font-weight: 700;
        text-transform: uppercase; }
      /* line 186, ../../../../../../../../../../var/lib/gems/1.8/gems/compass_radix-0.0.12/stylesheets/compass_radix/_menu.scss */
      #footer-menu > ul.menu > li > ul.menu {
        margin: 0;
        padding: 0; }
        /* line 189, ../../../../../../../../../../var/lib/gems/1.8/gems/compass_radix-0.0.12/stylesheets/compass_radix/_menu.scss */
        #footer-menu > ul.menu > li > ul.menu > li {
          list-style: none outside none;
          margin: 0 5px 0 0; }
          /* line 193, ../../../../../../../../../../var/lib/gems/1.8/gems/compass_radix-0.0.12/stylesheets/compass_radix/_menu.scss */
          #footer-menu > ul.menu > li > ul.menu > li > a,
          #footer-menu > ul.menu > li > ul.menu > li > span {
            font-size: 0.90em; }