Admin CP Rendering and Safari

[daemon]

I've found a bit a problem with the Admin CP rendering in Safari. I can only produce this in Safari and it only happens some of the time (generally after a a refresh).

The code is fine:

<div class="navtitle" align="right" ondblclick="toggle_group(0); return false;">
            <span style="float:left">Options</span>
            <a href="index.php?do=buildnavprefs&amp;nojs=0&amp;prefs=&amp;dowhat=expand&amp;id=0#grp0" target="_self"
                onclick="toggle_group(0); return false;"
                oncontextmenu="toggle_group(0); save_group_prefs(0); return false"
            ><img src="../cpstyles/vBulletin_3_Default/cp_expand.gif" title="Expand Group" id="button_0" alt="" border="0" /></a>
        </div>
        <div id="group_0" class="navgroup" style="display:none">
        <div class="navlink-normal" onclick="nav_goto('options.php?null=0');" onmouseover="this.className='navlink-hover';" onmouseout="this.className='navlink-normal'"><a href="options.php?null=0">vBulletin Options</a></div>
        </div> 

This only affects the "Options" group:

[Archimedes]

Here the same...