When you are in anonymous mode, published, you dont want any of the SharePoint scripts to be running like named.dll. The way to hide it is to wrapped the SharePoint scripts in a security tab. Thus security trimming the scripts and SharePoint overriding CSS classes.

<Sharepoint:SPSecurityTrimmedControl PermissionsString=”BrowseDirectories” runat=”server”>
  <!–showing sharepoint scripts –>
  <SharePoint:ScriptLink name=”init.js” runat=”server”/>
  <Sharepoint:CssLink runat=”server”/>
</Sharepoint:SPSecurityTrimmedControl>