The help module generated i got looks like

function tagging_center_help_help($path) {
  switch ($path) {
    case 'queue/setlanguage/%':
      return theme('advanced_help_topic', 'tagging_center_help', 'Select-the-Language');
  }
}

Which was my intention, but when run, $path is passed looking like

'queue/setlanguage'
when in fact it is (in the address bar of the browser)
'queue/setlanguage/1234

So the icon never appears. Not sure if this is a help, advanced_help or helpinject issue.