Hi,
I think you need to update Unity, PlayMaker and the quaternion package.
I am running on Unity 4.3.3, PlayMaker 1.7.7 and the latest Quaternion package from the wiki and I don't have these warnings.
But, that's of course if you use PlayMaker to begin with, if you have a project where you don't use playmaker, then you shoud not have it in your project.
Bye,
Jean