Sound out of sync

hello.
i've made a iDVD project that has 6 shorts films on it. the last short is giving me problems. when i play it on iDVD it's fine, but when i make a disk image it goes out of sync half way through.
this project was fine when i made it into a disk image before. i've changed it a bit since, but the only difference is that the 5th film is shorter then before.
i've replaced the clips with new ones and updated the project, but the 6th film is still out of sync.
any help would be great. thanks.

Did you try deleting the encoded assets before making a new copy?
iDVD 6: No audio on finished DVD
http://docs.info.apple.com/article.html?artnum=303550
iDVD: Troubleshooting issues with burning discs
http://docs.info.apple.com/article.html?artnum=302925
Sue

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