Try this...
skin/common_files/modules/Manufacturers/menu_manufacturers.tpl
Replace...
Code:
{include file="customer/menu_dialog.tpl" title=$lng.lbl_manufacturers content=$smarty.capture.menu additional_class="menu-manufacturers"}
With...
Code:
{include file="customer/menu_dialog.tpl" title=$lng.lbl_manufacturers content=$smarty.capture.menu}