I install build 2320 and no error.
I install build 2528 and do have an error.
This is the support response:
In response to your issue please note that though the system is Blu-Ray capable, however the Graphics card "ATI Radeon HD 5900 Series" Drivers do not support the RGBOverlay technology thus giving errors with Blu-Ray playback.
Video overlay (RGB Overlay) is a technique implemented by most modern graphics cards that allows an application (PowerDVD) to write to a dedicated part of video memory, rather than to the part (RAM) shared by all applications. In this way, clipping, moving and scaling of the image can be performed by the graphics hardware (graphics card) rather than by the CPU in software.
I suggest you to once visit the manufacturer website and contact their technical support to obtain drivers for your card which supports RGBOverlay in order to resolve the issue.
Are they just making this up?