With full-on debugging Questionnaire module yields Strict Standards errors as follows:

1. Strict Standards: Creating default object from empty value in [...]/mod/questionnaire/view.php on line 23
Should presumably now read:

if (!isset($SESSION->questionnaire)) $SESSION->questionnaire = new stdClass();
$SESSION->questionnaire->current_tab = 'view';

2. Strict Standards: Creating default object from empty value in [...]/mod/questionnaire/questiontypes/questiontypes.class.php on line 205
Perhaps get_choices function should now read:

function get_choices() {
global $DB;

$this->choices = array();
if ($choices = $DB->get_records('questionnaire_quest_choice', array('question_id' => $this->id), 'id ASC')) {
foreach ($choices as $choice)

{ $this->choices[$choice->id] = new stdClass(); $this->choices[$choice->id]->content = $choice->content; $this->choices[$choice->id]->value = $choice->value; }

}
}

3. Strict Standards: Redefining already defined constructor for class questionnaire_question in [...]/mod/questionnaire/questiontypes/questiontypes.class.php on line 196

Likely the earlier constructor "function questionnaire_question" should now be renamed __construct, as PHP 5.3 is required anyway, and the "fake" constructor removed.

Regards,
John