The Group menu in Quiz Module no longer works as before: all students are displayed regardless of what group is chosen.

Since installing Build 20080703 yesterday, I can no longer view the Quiz results of specific groups. For example, I have a course with 6 groups, each group contains about 40 students. Whether or not I select 'All participants' or a specific group, the results of all students are displayed.

I have attached two screen shots: one shows part of the results screen in which 'All participants' are chosen. The second screen shot shows the results in which a certain group (2008 Classes AB), has been selected, but still all students are displayed. Note that the student name visible in both screen shots is not in Group '2008 Classes AB', and so should not be visible in the second screen shot.

This bug does not seem to effect other activities in which it is possible to view student data according to groups.