Noticing lots of noise in the webserver logs, such as:
[error] PHP Notice: Undefined property: picture in /var/www/stjohn-moodle-18/moodle/lib/weblib.php on line 3512
[error] PHP Notice: Undefined property: shuffleanswers in /var/www/stjohn-moodle-18/moodle/question/type/multichoice/questiontype.php on line 167
[error] PHP Notice: Undefined property: delay1 in /var/www/stjohn-moodle-18/moodle/mod/quiz/attempt.php on line 173
These are due to if ($variable) statements needing to be if (!empty($variable))
Patch for MOODLE_18_STABLE (as of 2008-08-08) attached.