AC3 is a mandatory codec, whereas EAC3 is optional, so it's possible some old players won't support EAC3.
Thanks for that tip. I guess I'll let the second render complete before I try burning. At this speed it's going to be a full day.
I just noticed that the DTS profile I created was wrong. The encoder is dca, not dts. I'm trying it again on a small render to see if it works.
What is the difference between ac3 and ac3_fixed? Should I prefer one or the other for blu-ray?