Re: computer vs DVD player?

Is there any stuttering or odd noise from the drive itself, or just the display?
How well do commercial DVDs perform in the funky drive?
Perhaps the drive manufacturer offers a firmware update that may address a known issue.
Try writing the Encore project as a DVD Folder. Than burn the DVD with a dedicated burning app (ie: Nero or Toast).
Is your media generic or brand-name? For DVD-Video, brand-name DVD-R burned at the drives slowest speed is a good idea.

Just some thoughts