Can't update the "votes" field ...

Hi all :)

I'm desperately trying to update the votes field of a media entry (actually any media entry!) but to no avail. I istantiate a media entry object, modify the required field and then pass it on to the update method of the client object, yet nothing happens. When I try to update other fields like "name" for instance, it works flawlessly.

Has votes ever truly been implemented? If so, what could possibly be the problem? Am I doing something wrong?

Thanks in advance for your help.