I have a 23.976 progressive MPEG2 encoded from a 23.976 uncompressed master file. When it's imported into Encore it shows as '29.97'. It's not transcoding, and all seems to be well with the final video - is this the way that Encore deals with footage like this? Dragging and dropping this M2v into premiere shows it's proper attributes, as a 23.976 file.
Interested in other people's workflows around this issue -