I don't know what it means so I did a search in Google using "idvd error #-34506" and got a lot of hits. This is copied from a hit This problem was resolved by Joe at my local Apple store's genius bar. He had me SHARE the movie as a Quicktime High Quality DV file which I then could open in iMovie on my iMac, add chapters and themes in iDVD and burn both disk image and DVDs - no problemo. Whole process took less than 2 hours - good quality too. Hope this helps someone else. Cheers! http://macosx.com/forums/mac-os-x-system-mac-software/267974-idvd-error-34506-a.html Cheers, Mike