Panels not displaying correctly for anonymous users

The problem is on a production site and panels has been removed due to this problem so I can't take screenshots, however a screenshot isnt going to tell you anything more than I can explain. It is a 2 column layout panel, There is a views block in the left panel and a simple block with an image in the right panel, they arent displaying side by side for anonymous users, they are displaying one ontop of the other.

There are no access rules.

There is no panels caching.

Export of panel:

$mini = new stdClass();
$mini->pid = 'new';
  $mini->name = 'main';
  $mini->category = '';
  $mini->title = 'New Stuff';
  $mini->contexts = array();
  $mini->requiredcontexts = array();
  $mini->relationships = array();
$display = new panels_display();
$display->did = 'new';
$display->layout = 'twocol';
$display->layout_settings = array();
$display->panel_settings = array();
$display->content = array();
$display->panels = array();
  $pane = new stdClass();
    $pane->pid = 'new-1';
    $pane->panel = 'left';
    $pane->type = 'views';
    $pane->shown = '1';
    $pane->subtype = 'new_stuff-block_1';
    $pane->access = array();
    $pane->configuration = array(
      'style' => 'default',
      'override_title' => 0,
      'override_title_text' => '',
      'css_id' => '',
      'css_class' => '',
      'link_to_view' => 0,
      'more_link' => 0,
      'feed_icons' => 0,
      'use_pager' => 0,
      'pager_id' => '',
      'nodes_per_page' => '5',
      'offset' => '0',
      'panel_args' => 0,
      'args' => '',
      'url' => '',
    );
    $pane->cache = array();
  $display->content['new-1'] = $pane;
  $display->panels['left'][0] = 'new-1';
  $pane = new stdClass();
    $pane->pid = 'new-2';
    $pane->panel = 'right';
    $pane->type = 'block';
    $pane->shown = '1';
    $pane->subtype = 'openx-0';
    $pane->access = array();
    $pane->configuration = array(
      'style' => 'default',
      'override_title' => 0,
      'override_title_text' => '',
      'css_id' => '',
      'css_class' => '',
      'module' => 'openx',
      'delta' => '0',
      'block_visibility' => 0,
    );
    $pane->cache = array();
  $display->content['new-2'] = $pane;
  $display->panels['right'][0] = 'new-2';
$mini->display = $display;

It happens in Firefox also