I've tried three times, now. The first was made burning the folders directly with nero, the last two were using a new ISO one with and one without the seemless layer option.
Nothing plays through on my Pioneer DV-414. On my Panny DVD/VCR nothing plays through the layer break, but I can skip a head and back it up to watch the rest of the film.
I am using Dynex DVD+R DL media (its all that was available when I went to the store, DL media is hard to come by).
My DVD Drive is a TSSTcorpCD/DVDW TS- L 532M
I have no firmware updates available. If I can find some other media, I'll try that, but I'm pretty upset. I guess I'll have to use the DVD-5.
I'm assuming its a player compatibility, although reports online are that my player should read DL +R fine.