I have some pretty big changes to the gradebook waiting for integration in MDL-26275. The user visible changes are fairly limited but the code changes behind the scene are quite large. If anyone has a development Moodle available running the current master development branch and is willing to spend some time testing that would be greatly appreciated. You just need to check that whatever you're currently doing in the gradebook still works to make sure that I haven't accidently broken something.
Of course, the code attached to MDL-26275 is not yet integrated and hasn't yet been through Moodle HQ's testing process so applying the code to a production site would not be a good idea.
Thanks in advance, Andrew