Yes, I had this problem on my Mark II. I made the changes you described, and didn't see anything FID-like over the serial.

Shame; I'd written a little VB app to control the player (and to select tracks based on a saved CSV from Emplode), and I wanted to be able to also display the current track details.

Bryan.

Mark 2 #080000515
12GB Green (was Blue)
...and it's full!