Burning an AVCHD project to a DVD - rendered to m2v / w64 (= the default set up in "Make Movie") - went into DVD Arch  and set to burn on a DVD using the "matching" AVC format but it errored early -long error statement ending with "vidoe underflows" So went back and set to what Steve Grisetii  suggests in his book = the mpeg2 format - burned like a champ.  DVD plays great - so - do I care? is there some advantage to staying in the avchd format? - or could I have something cross wise in the burn set up?  - this is a single movie disc.   K