I have had a similar problem.
I am working on a DVD for a local holiday complex and am using a video clip for a motion menu.
When playing the video clip in Premiere Elements, it is fine. When playing the clip and previewing the DVD in Encore 1.5, it is fine. But when the DVD is burned, it still plays fine on the PC but when playing back on a standalone DVD Player (I have tried 3 different ones), the Motion Menu flickers/Strobes. No other video clips throughout the DVD have a problem, just the Motion Menu?