Currently Being ModeratedOct 6, 2012 9:53 PM (in response to namtaB)
What you are seeing is most likely normal.
Have you recorded RAW files before? Some people have reported problems with specific cameras with Aperture's RAW conversion, but your problem seems more likely to be your misunderstanding of how RAW works. Let's get that out of the way first, before chasing down other solutions.