I have been doing Rifftrax for a while and have had little trouble syncing the Riff with the DVD.
With Planet of the Dinosaurs I had nothing but trouble.
Whole scenes seemed to be missed on the rifftrack. It jumped passed, for example, ANOTHER walking scene and went right to the sleeping on the metal box scene. This occurred several times.
Is anyone else having this trouble?
The widescreen special edition from RETROMEDIA is the only DVD version that will work. Are you using the old fullscreen version from GOODTIMES video?