On a lark I decided to try a render to mpg using the default template setting (29.97 fps) even though the clip was shot at 24P (advanced) and the timeline showed: 23.976 fps progressive, 720x480x24, DV (removing 2-3-3-2 pulldown)
I included audio in the render and this time the resulting mpg was in sync. Is my camera lying to me when I set it to 24p? (Panasonic DVX100b)