Hi everyone,
this post is related to the issue where it is impossible for a teacher/manager to hide the grades of a quiz from the gradebook. The option is available, but ticking the checkbox does not affect the visibility. See http://tracker.moodle.org/browse/MDL-18301
Looking at the discussion we had on the tracker, we were thinking about removing the option from the gradebook by letting the user know that the visibility is controlled by the activity itself. This would be a temporary solution before working on the gradebook itself, which is far more complex.
If you think that we are on the wrong path, please let us know by commenting on the tracker issue.
Meanwhile, let's make Moodle better!
Fred