Bridge displays thumbnails sideways

Adobe Bridge 2.1.1.9 displays my dng file thumbnails sideways, that is, with a 90˚ CW orientation.
When opening them in any other application, they open properly, even when opening from Bridge to ACR or wherever.
If I rotate the Bridge Thumbnails CCW so as to view them properly, they will then open sideways in ACR or other applications when sending them from Bridge.
My files are from a Hasselblad CFV digital back. Is there something particularly wierd with the Bridge/Hasselblad CFV combination, or is there a bug in Bridge? If so, has this been an issue with others, has it been resolved in newer versions, or is there something I can do to fix what I have? Any help appreciated. My neck is getting a painful crick.
Thanks,
Michael H. Cothran