Media Center & Blue-Ray DVDs

I'm running Windows 7 Ultimate (64-bit) and was very surprised that it is unable to play Blue-Ray DVDs. Yes, my computer will play blue-ray with 3rd party software, but why would Microsoft leave this DVD video standard out of Media Center?

Read Windows 7 Media player will not play back BluRay disc's - Microsoft Answers .

Cyberlink's PowerDVD 10 will allow you to watch Blu-Ray discs. It installs an add-in to Media Center so you can stay within Media Center to watch the Blu-Ray without having to exit to Windows.

I upgraded to Power DVD 10. It plays blue-ray, but looses digital audio when the main feature begins.
I'll have my computer set to use the spdif Dolby 5.1, and it works through all of the previews, whether they are simple stereo or 5.1. When I "play" the main feature the audio disappears.
The only workaround seems to let it play while switching the audio output to the stereo mini-plug and then back the spdif.
It should be a lot easier than that.