I just noticed that the tooltip for editing questions categories in the list of categories , and also the legend in editing a category incorrecty show 'edit this course category' and not 'edit this question category'.

This is due to missing 'quiz' second parameter in get_string calls in category_class.php script

ppollet@prope:~/web/moodle.195/question$ svn diff -rHEAD
Index: category_class.php
===================================================================
— category_class.php (révision 246)
+++ category_class.php (copie de travail)
@@ -62,7 +62,7 @@
function set_icon_html($first, $last, &$lastitem){
global $CFG;
$category = $this->item;

• $this->icons['edit']= $this->image_icon(get_string('editthiscategory'),
  + $this->icons['edit']= $this->image_icon(get_string('editthiscategory','quiz'), <--here
  "{$CFG->wwwroot}/question/category.php?".$this->parentlist->pageurl->get_query_string(array('edit'=>$category->id)), 'edit');
  parent::set_icon_html($first, $last, $lastitem);
  $toplevel = ($this->parentlist->parentitem === null);//this is a top level item
  @@ -148,7 +148,7 @@
  $this->str->delete = get_string('delete');
  $this->str->moveup = get_string('moveup');
  $this->str->movedown = get_string('movedown');
• $this->str->edit = get_string('editthiscategory');
  + $this->str->edit = get_string('editthiscategory','quiz'); <--here
  $this->str->hide = get_string('hide');
  $this->str->publish = get_string('publish', 'quiz');
  $this->str->order = get_string('order');

This also requires adding the missing translation string editthiscategory' in en_utf8/quiz.php and also in other langages

Cheers.