Hi Steve,
I´m not an DVDArchitect-user, but DVD-9 in general has several problems with standalone-players, so there´s nearly no doubt that it´s a DVD-/+R-media-problem.
I have seen many problems on several players especially with the layerbreak-position and the content that comes afterwards (meaning which lays on layer1).
1. layerbreak-position
if you did not create a dedicated disc-image before burning, there might be the problem with the layerbreak-position. most burning-apps will set the layerbreak-postion at the real physical end of layer0, which is wrong in most cases. In case you´ve got a disc-image, you should be ready to burn the data.
2. reflection of layer1 of the optical media.
all DVD+/-R-media have a different reflection (lower reflection-output) from the disc, and especially on the 2nd layer. it could result on a problem while re-focussing on the 2nd layer or reading the data.
3. bitrate
high bitrate could also result in playback-issues. it´s highly recomended to use lower bitrates.you should use a max. bitrate of 8,5Mbit/s or less.
should this DVD be replicated?
danny