I've tried this on Max Design 2012 32bit without any service pack installed and it is the same problem.
I also tried it on Max Design 2012 SP2 + Subscription Pack and it is the same problem. It only seems to be working in 2011 for me.
The only thing that is written into my .PMF-file is:
I'm guessing this means Left, Middle, Right. Where -1 refers to Left, because that's what I chose when saving the pose.
Please give us a hotfix for this!
🙂