[MacDV] Audio sync

[Robert Green]

I am making a dvd with idvd from a project in imovie. It contains many 
stills and some video. Everything plays as it should in imovie but when 
I burn it with idvd the audio from the clips are out of sync by the end 
of the project. It is about a 15 minute presentation that has about 3 - 
1 minute video clips. One at the beginning, one in the middle and one 
at the end. The first one is alright, the second one is slightly out  
and the third one is way off. Any ideas as to the problem?