Rob, yes, the images are DNG. I've always shoot RAW and import as DNG....hmmm. I'll have to check if I have auto-write on or off. I wasn't using it for a long time and then switiched it on. Would you mind giving me an explanation of how you'd recommend making the backups? and how to do it in the future? I'm ready to jump to Aperture....
but seriously, how can I help rally for the option to prevent LR from writing/rewriting etc. How many versions ago did this start or has it always been going on.
thank you too.