Cant offer anything particualrly helpfull but I would echo Grazies cooment - version 5 did have a few bugs and I think i occasionally had the same prob on one iteration of v5.

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I have two prejudices - I am anti HDV for consumer camcorders, and I eat mooks who claim to be pro wedding vidders and ask dumb questions.

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JVC DV5001e (big cam), Sony PC6E (tiny cam), Vinten pro5, PAG light, SM58, Sony ECM50, Sony C-76, 0.5x convertors for sony, Rode video mic, Vegas 7.