Creating a thread for 64 bit Vista users to post to regarding support for the DNG codec on Vista x64.
Currently x64 is not a supported platform for the RC version of the codec. Hopefully this is something that will be corrected when it ships. Adobe seems to support 64 bit, in for example LR 2.0 beta, so I imagine this will happen as well for the codec, but just to be sure 64 bit Vista users should comment on this thread.
Damon