Any thoughts on this one?
I think have come across an issue with the Detailed Statistics page on the Lesson Module using Moodle V2.1.
With no student selected, there are no class statistics displayed for each question, however if I select a student, the student's answer is shown with the stats for the class against each answer.
URLs on my test moodle are http://localhost/mod/lesson/report.php?id=337&action=reportdetail (no student selected)
and http://localhost/mod/lesson/report.php?id=337&action=reportdetail&userid=2979&try=0 (student selected)
In 1.9 the class stats are displayed with or without a student selected.