tiki version 1.6.1
there is typo in file "tiki-quiz_stats_quiz.tpl"
at line around 47 and 54.
the problems are from <prev> and <next> hyper link.
if click the links , there is Db error
it uses a wrong php file "tiki-quiz_stats.php" in both
should be "tiki-quiz_stats_quiz.php"