Ok, got ya. My 709 is only 2 weeks old, and it came with the silver mic too. After I un-boxed it, I hooked up the HDMI main out to my TV so I would have a GUI, then I installed the latest firmware via USB before another cable was plugged in, or setting was changed. I use Audyssey EQ all the time, and I'm still experimenting with Dynamic EQ...Sometime on, sometimes off. I'm not experiencing what you are.
The latest firmware is 1111 1077 0211 1105
My unit shipped with 1061 0677 0210 8104
Samsung UN60D6420 ~ DirecTV HR-44 ~ Sony S5100 ~ Roku 3 ~ Denon X-2000 ~ HTD Level TWO Towers ~ HTD Level TWO Surrounds ~ Power Sound Audio XV15