Noticed something in the code:

Line: 151: fourth &nbsp is missing the ;
Code:
        echo '   &nbsp' . TEXT_EDITOR_INFO . zen_draw_form('set_editor_form', FILENAME_RECOVER_CART_SALES, '', 'get') . '  ' . zen_draw_pull_down_menu('reset_editor', $editors_pulldown, $current_editor_key, 'onChange="this.form.submit();"') .
Should read as: fourth  
Code:
        echo '    ' . TEXT_EDITOR_INFO . zen_draw_form('set_editor_form', FILENAME_RECOVER_CART_SALES, '', 'get') . '  ' . zen_draw_pull_down_menu('reset_editor', $editors_pulldown, $current_editor_key, 'onChange="this.form.submit();"') .