My mcd-201 serial#1454 has had backend frimware v.5 and v.6 updated. I have also done front end updates v1.2, v.3, v.4, and v.5. I have trouble with sacd pink floyed dark side of the moon saying no disc. I have also had trouble with cds skipping. My dealer is going to replace my player when the new transport comes out. I think the current transport is made by raymedia. My dealer changed out the transport with modified one from mcintosh. I still had problems with discs. Has anybody done this many firmware updates or changed out the transport with good results. I enjoy the sound of the mcd-201 when it is working properly. My dealer told me it will take about six weeks to get a new mcd-201. It will be worth the wait. 
