voodatari, You are right. I have had this same thing happen to me on a number of occasions. Sometimes, while the WD box is on and sitting idle at the home screen, it changes the color space value from RGB Low to RGB High, all by itself, or sometimes it changes from RGB Low to YCbCr, all by itself (less frequently). This does not happen while I am watching something, but if I leave the box on and sitting idle, it sometimes switches the color space.
For me, this doesn't seem to happen as often as it did with the previous firmware (1.04.31), but it is still happening.
As far as WD's advice to "check the forums", unfortunately you will not find any answers here. All you will find is that there are a lot of other posts about the same issues!
What is really troubling to me is the fact that according to the release notes, there have been no changes that relate to the HDMI problems, however, it always acts a little bit differently with every firmware release! It almost seems like the things that we are seeing are happening by accident, without WD knowing or realizing that the new firmwares are changing this behavior.
I really wish that WD would implement a change that allows the box to remember the video settings that we set! It would eliminate many many problems that are posted here.