We've been having some reports of multiple choice all or nothing where the grading comes back as slightly off. This appears to happen only when you have a total possible selection that can't be accurately represented as a fixed decimal (1/3, 1/6, 1/7, etc). It looks to be related to the increased precision fix in
SAM-2087 where because of the improved precision, some of these values are adding up and still not quite equaling 1.0. (.99 in the UI)
In the database, it appears as if the AUTOSCORE is stored as
'0.333333333333333' where before it was '0.33333334' which could explain it but a little more research is needed. My suggestion is for this specific question, if all the answers are correct just to set the value to be as expected. (Similarly to how it sets it to 0 if it's incorrect)
It seems like this is working correctly with Oracle.