With Match framerate you should see no stutter. On the SMP you can set it via
Setup > Audio/Video Output > Video Output > HDMI > Auto > Auto > On
and should be done similarly on the old Live.
If it still does not work, you CAN downgrade to 1.06.34 and then to 1.06.15. I even downgraded from 1.06.43 to 1.06.15 (or was it 1.05.04? Would have to check the threads). Just make sure to do a complete reset before and after each update.