using Moodle 2.0.1+ (Build: 20110218)
MDLQA-689 :: A teacher can choose from one of 4 grading methods for a quiz :: failed
When a test has been taken (several times), if the grading method is changed, the change will not be applied to a given student until he makes another attempt. This is not the expected behavior of that "grading method" setting, which should apply immediately upon the method being changed.
Joseph