I just read that the upgrade disc will disable the video playback while the car is in motion, is this true? Here is the quote.

Disclaimer: The upgrade navigation software will give you upgraded maps, points of interests, etc.; however, you will also disable video playback while the vehicle is in motion due to a software/firmware upgrade by Pioneer.

Thanks,

Les

Since you posted this in the D-series sections, I assume you are talking about any D-series model, in which case, no its not true

Yes, it's a D1. Thanks.