We have not heard back from anyone regarding this issue but we have in the meantime figured out a couple of things. 1-FCP will not let you insert either audio or video if either the in or out points are over ANY type of video or audio transition, i.e: video dissolve, audio fade, sapphire effect, whatever. Trust me, we have run numerous tests on this and we always get the same result which is to have black sent out to the deck from FCP or, occasionally, a freeze frame of the first frame of video in the edit. 2-We have also run across not being able to enable either video or a specific audio channel (or channels) to insert, the yellow indicators on the edit to tape deck just won’t light up. However closing the edit to tape window and re-opening it seems to solve this.
Also, I don’t know what type of deck you are mastering to but I seem to remember that some decks are not capable of insert editing only audio as some formats imbed audio within the video track on the tape.
These are big problems Apple should figure out and fix, this is not PRO!
tb