Heroes Blu-Ray, U-Control causing choppy playback?

[MrBravia]

Hi. I am having an issue with the new Heroes BD and U-Control. When it gets to a section where there is more than 1 PiP option available on the disc (EG. PiP commentary AND Hero Illustration), the playback starts to get very choppy.

I have tried using both Cyberlink 7 and WinDVD9, both have the same issue. I don't think it is my hardware because I am running two ATI 4870s Crossfired and have a Quad core overclocked to 3.2.

I tried the discs on my PS3 and it works fine without the stuttering.