Well, I will drag my Objective and Subjective worlds into this once again. 
- The objective world.
Just because Quantum Mechanics(QM) has an element of chance from our point of view, doesn’t mean it does from natures point of view. I believe also QM is deterministic, just we can’t see it.
Anyway.
On to consciousness and whatnot.
Since the mind and all of our thoughts are without a doubt contained in our brain, then it must follow the laws of nature.
The problem with this is that we don’t actually know much about how nature works. If QM indeed does have an element of chance, maybe Objective free will actually exists.
But then, this is exactly like it is now.
Even if a choice is predetermined by the billions of small on/off switches that makes up nature and our brain, after the choice has been made, it couldn’t have been made any other way WITH an element of chance in the picture.
Let’s take QM then.
A particle has 3 possible states, and once it appears on one state, the choice has been made. We might never know WHY it chose that point in spacetime, but it did.
No doubt something /else/ must have been in on the decision.
Now for the subjective world.
The bliss of not understanding a system from inside a system, is also as much a curse. But it’s also the only way for it to function correctly.
Even if we could see all choices, from an Objective view, we could then choose to disregard all those choices, meaning there is another choice on another level created.
This goes up and up and up.
The more we see, the more choices we have, and the less we know.
The only way to have true free will, well, I guess that isn’t possible.
But do all this matter to us here and now? No, it doesn’t.
Consider this example.
A musician is sitting on his computer with a sequencer, he’s programming the drums, playing the melody lines on his keyboard and adding small effects here and there.
He has a drum line set, but he’s not sure on the bass line.
He goes through several types of sounds for the bass, he plays different notes, but he’s note quite sure.
What’s happening then, is of course tons of predetermined “stuff” in the brain.
Sensory inputs, memories of music and what he likes and everything, neurons etc.
But then, suddenly it hits him, he finds a sound he likes, it hits him, he gets an emotion from that sound, he utters “yes! this is the sound I want to use!”
Maybe he chose it because the frequency content of the bass line is what he wants, or on a lower level because all the electrons made their choice and it’s now inevitable to have chosen anything else.
But all that doesn’t matter, because part of being a good musician is using your ears, and also to love music. What goes on behind the scenes has no meaning.
This is why I seperate between levels of living, and levels of understanding.
The world of QM is only important to particles, not to planets.
As it’s not important to us.
Because of all the things we do and experience everyday, we are on another /level/ in the universe.
We MUST make a difference between these levels, and we cannot blame one level, for influencing another.
Hm, and I think that’s it. Hope it gives you something to think about.