[greenie44]

Thanks saltman. With your advice, I went and got DVDLab. In using it, it appears the first VOB file has a problem - it plays fine, but I get an error saying that it is not the right stream type and that there might be a header error. (Which may have been the problem with TMPGenc the whole time.) I'm going to try backing it up with DVD-Shrink and reburning to see if that helps.

Thanks for your suggestion - I might just get there.