in the webassist/themes/defailt/templates/index.dwt.php file, change:
<h1><?php echo WA_getCMSContent($database_PowerStoreConnection, $PowerStoreConnection, 'Middle Pod' , 'Header'); ?></h1>
to:
<h1><?php echo str_replace(array("<p>","</p>"),"", WA_getCMSContent($database_PowerStoreConnection, $PowerStoreConnection, 'Middle Pod' , 'Header')); ?></h1>