Code:
<div class="line1">
<div class="logo" style="text-align:left;">
<a href="{$catalogs.customer}/home.php"><img src="{$ImagesDir}/xlogo.gif" alt=""></a>
</div>
{include file="customer/tabs.tpl"}
{include file="customer/phones.tpl"}
</div>
I would removed the align="left" from the image unless you have content to the right of it.
Adding the style of text-align: left should solve your problem.