Comment 9 for bug 786904

Oh: I just realised why it *has* to fail silently if you pass the checkPermissions and try to write an object. checkPermissions is checking on a per-object basis. Once you pass that stage, it is possible to write some fields but not others. Therefore, it is just going to take the fields which it can and write them, and throw the others away. It doesn't really make sense for it to raise an exception later on if one of the fields can't be written.