Hi Jim,
DVI is RGB only-- I don't think it allows YCbCr 4:2:2 or do you mean that that is your output?
By blue&red are swapped do you mean that the color space is just wrong (everything looks purple) or that the colors are actually swapped?
Is this a fast plug and replug or a more normal cycle? Are you seeing the source read out the EDID?
Dave