Blue Cast on CR2 conversion to DNG

I'm wondering if anyone can explain why CR2 files from a Canon 1D Mark II exhibit a strong blue cast when converted to DNG using the standalone Adobe DNG converter version 5.5.0.97 or Lightroom 2.5. (see examples below).
Here's the test I conducted: I first shot a JPEG image of an X-Rite grey card using Auto White Balance then used it to set a custom white balance in my 1D Mark II. I then repeated the same test using a RAW file and in both instances the camera functions as expected. However, when I converted the CR2 files to DNG they took on a strong blueish cast.
For comparison purposes I then did the same test using a Canon 5D and those CR2 files do not show the blueish cast when converted to DNG.
Here's a shot of the thumbnails as they appear in BreezeBrowser Pro (thumbnail color management enabled). They look the same in Adobe Bridge too. The first six thumbnails are from the Canon 1D Mark II and the second six are from the Canon 5D.
Thanks for any help.

The only thing wrong with your DNG is that the embedded preview was created with the WB set to something like Tungsten while the DNG metadata parameters say As Shot for the WB. How it got that way you're going to have to figure that out. I say this because both LR and Br show a brief blue flash when the image is initially imported, then it corrects to the As Shot WB. This means the preview is bad but the parameters are ok.
I'm going to guess you had the DNG open in LR and clicked or synced it to something like Tungsten from some other image, and then created the DNG with the preview, then corrected the WB in LR and then updated the DNG metadata without updating the preview--perhaps by having the Auto XMP writing turned on.
I'd suggest removing the CR2 (and any associated DNGs) from the library, deleting any XMP, and starting over by importing the CR2 with As Shot parameters and convert directoy to DNG from W/in LR and see if you can make it happen, again. If you figure it out, then tell us. If you can't figure it out, then don't worry. The CR2 and the DNG are ok and you can use them for creating your color profile with the passport software which ignores any edits you make to the DNG anyway. Trying it with my Passport software shows a non-blue DNG with the green rectangles over the various squares, so the DNG, itself, is fine, just the preview is wrong.

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