DNG-converted 10D files too large, not recognizable in Aperture

Question

[I've posted this message in the Adobe DNG forums after doing some searing around for an answer. I thought some others here might be doing the same thing and could comment]
While importing some of my older Canon 10D-shot images into Aperture, I noticed something curious about the DNG-versions of the files. They're much larger than I would expect and Apple's Core Image processor doesn't appear to be able to read them. For example, on one file the original CRW file is 5.3MB. The DNG conversion without the embedded original is 17.4MB. This is consistent across all my 10D converted files.
Apple's Preview app, as well as anything else based on the Core Image processing code, can't read the DNG, but it can read the original CRW. I know that Apple has botched parts of the DNG specification, but since the converted DNG is twice the size I would expect it to be, this seems like it might be a problem with the DNG converter itself. Anyone else seeing this with rev 3.2 of the converter?
BTW, the files open up in ACR just fine.
G5 1.8G SP, 1.5M RAM   Mac OS X (10.4.3)  

Answer 1

Sorry for the noise. It turns out that my prefs had gotten munged overnight when the DNG converter crashed and had returned to one of my test configurations where I was converting the RAW files to linear. Aperture, as is well understood, doesn't handle the de-mosaiced format well at all.
This was user error.