I've done some testing, here are log files and command line output:
XBMC r31542 with lib/kext 1.03: audio and video but only black & white. ---
UPDATE: My mistake, software rendering was chosen, with hardware rendering video is in color. Old driver means no sleep.
XBMC r31542 with lib/kext r115: audio but no video, when playback is stopped this is written to the prompt:
DtsCloseDecoder: Ioctl failed: 10
Clearing PendMdata 0x30247fa 1
Clearing PendMdata 0x30247d6 2
...
Clearing PendMdata 0x3021d3a 131
At the same time this is logged to kernel.log:
Jul 3 14:07:32 macmini kernel[0]: BroadcomCrystalHD:
tart
Jul 3 14:07:32 macmini kernel[0]: opening HW
Jul 3 14:07:32 macmini kernel[0]: crystalhd_hw_open: setting up functions, device = Link
Jul 3 14:07:32 macmini kernel[0]: Starting Crystal HD Device
Jul 3 14:07:32 macmini kernel[0]: Opening HW. hw:0x5a43404, hw->adp:0x5d0f500
Jul 3 14:07:32 macmini kernel[0]: Closing HW
Jul 3 14:07:32 macmini kernel[0]: Stopping Crystal HD Device
Jul 3 14:07:32 macmini kernel[0]: BroadcomCrystalHD: Registering power handler
Jul 3 14:07:32 macmini kernel[0]: BroadcomCrystalHD: Found HW and started driver SW.
Jul 3 14:07:32 macmini kernel[0]: BroadcomCrystalHD: Turning off
Jul 3 14:07:32 macmini kernel[0]: BroadcomCrystalHD:
etPowerStateOff
Jul 3 14:07:32 macmini kernel[0]: Nothing To Do Suspend Success
Jul 3 14:08:01 macmini kernel[0]: Opening new user[0] handle
Jul 3 14:08:01 macmini kernel[0]: opening HW
Jul 3 14:08:01 macmini kernel[0]: crystalhd_hw_open: setting up functions, device = Link
Jul 3 14:08:01 macmini kernel[0]: Starting Crystal HD Device
Jul 3 14:08:01 macmini kernel[0]: Opening HW. hw:0x4216e04, hw->adp:0x5d0f500
Jul 3 14:08:01 macmini kernel[0]: allocated 26 elem
Jul 3 14:08:01 macmini kernel[0]: Initializing Dio pool 18 1024 305c 0x4249324
Jul 3 14:08:01 macmini kernel[0]: crystalhd_link_download_fw entered
Jul 3 14:08:02 macmini kernel[0]: Firmware Downloaded Successfully
Jul 3 14:08:33 macmini kernel[0]: DelQAddr:0 RelQAddr:0
Jul 3 14:08:39 macmini kernel[0]: number of rx success 0 and failure 0
Jul 3 14:08:39 macmini kernel[0]: Capture Stop: 29 List0:Sts:0 List1:Sts:0
Jul 3 14:08:59 macmini kernel[0]: Firmware command T/O
Jul 3 14:08:59 macmini kernel[0]: FwCmd Failed.
Jul 3 14:08:59 macmini kernel[0]: fw cmd 7376311b failed
Jul 3 14:09:20 macmini kernel[0]: Firmware command T/O
Jul 3 14:09:20 macmini kernel[0]: FwCmd Failed.
Jul 3 14:09:20 macmini kernel[0]: fw cmd 73763101 failed
XBMC r31542 with lib/kext r123: slow start, driver won't load ("INFO: CrystalHD: broadcom crystal hd not found").