What version are you running? I had the same problem using version 3.4.4
I had modified my meta.tpl to using a FunkyDunk's Meta Control Mod. My fix is on this page at the bottom.
http://forum.x-cart.com/viewtopic.php?t=3703&postdays=0&postorder=asc&star t=15
Here is where I posted my intitial problem:
http://forum.x-cart.com/viewtopic.php?t=5492
OF COURSE this is the modified version of the meta.tpl file that includes the meta tag mod info.
the part that operates webmaster mode is this:
Code:
{if $webmaster_mode eq "editor"}
{if ($usertype eq "P" or $usertype eq "A") and $login}
<script>var store_language = "{$current_language}"</script>
{else}
<script>var store_language = "{$store_language}"</script>
{/if}
{if $user_agent eq "ns"}
<script src="{$SkinDir}/editorns.js"></script>
{else}
<script src="{$SkinDir}/editor.js"></script>
{/if}
{/if}