Problem with .MKVs (No Audio), How to remove header compression Options

[wuoma]

I've had my WD live hd for a while now and all videos have played with no problems.

Now however I've started to get some problems with some new .mkv files with 6ch audio.
First of all, I have tried both the digital and the stereo output and neither of them work. The videos live on my windows server share and I can play them perfectly well with my laptop using any program (for example VLC or media player classic) so the files are working.

The only thing I can see in common in these files is that they are new (like TV shows) and have similar audio

VLC gives me this info about the audio track of a file that refuses to play on the WD:
Dolby AC3 48000Hz 6ch
Codec: A52 Audio (aka AC3) (a52)
Language: English
Channels: 3F2R/LFE
Sampling rate: 48000 Hz
Bitrate: 448 kb/s

Any idea what is the matter or is this a feature?
Really frustrating and seemed to start just a couple of weeks ago.

EDIT: Tried with both the newest official FW and the newest beta.

[drfahrenheit]

Some MKV-files don't have sound when played on my WDTV Live. They have AC3 sound and play fine on my computer. I'm aware of the DTS-issues, but as far as I can see these files have AC3 sound. Changing audio output (stereo/digital) makes no difference. WDTV is connected to my TV through HDMI.

Below is all the MediaInfo on the file that doesnt have sound on WDTV. Under that info, is the MediaInfo on another file with what seems to me, identical format/codec, but this one works fine! Any ideas?

THIS FILE HAS NO SOUND:

CODE

General
Format : Matroska
File size : 1.09 GiB
Duration : 48mn 43s
Overall bit rate : 3 214 Kbps
Writing application : x264.exe
Writing library : mkv2rls x264-tv version built on 2010 jul 11

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings, CABAC : Yes
Format settings, ReFrames : 3 frames
Muxing mode : Container profile=Unknown@3.1
Codec ID : V_MPEG4/ISO/AVC
Duration : 48mn 43s
Bit rate : 2 824 Kbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.128
Stream size : 964 MiB (86%)
Writing library : x264 core 88 r1471 1144615
Encoding settings : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=6 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=20 / sliced_threads=0 / nr=0 / decimate=1 / mbaff=0 / constrained_intra=0 / bframes=3 / b_pyramid=1 / b_adapt=2 / b_bias=0 / direct=1 / wpredb=1 / wpredp=0 / keyint=240 / keyint_min=24 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=2pass / mbtree=1 / bitrate=2824 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / aq=1:1.00

Audio
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Codec ID : A_AC3
Duration : 48mn 43s
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Stream size : 134 MiB (12%)
Title : English
Language : English

THIS FILE WORKS FINE, HAS SOUND:

CODE

General
Blood\true.blood.s03e03.720p.hdtv.x264-immerse.mkv
Format : Matroska
File size : 1.46 GiB
Duration : 58mn 52s
Overall bit rate : 3 546 Kbps
Writing application : x264.exe
Writing library : mkv2rls x264-tv version built on 2010 jun 25

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings, CABAC : Yes
Format settings, ReFrames : 3 frames
Muxing mode : Container profile=Unknown@3.1
Codec ID : V_MPEG4/ISO/AVC
Duration : 58mn 51s
Bit rate : 3 158 Kbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.143
Stream size : 1.27 GiB (87%)
Writing library : x264 core 88 r1471 1144615
Encoding settings : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=6 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=20 / sliced_threads=0 / nr=0 / decimate=1 / mbaff=0 / constrained_intra=0 / bframes=3 / b_pyramid=1 / b_adapt=2 / b_bias=0 / direct=1 / wpredb=1 / wpredp=0 / keyint=240 / keyint_min=24 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=2pass / mbtree=1 / bitrate=3158 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / aq=1:1.00

Audio
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Codec ID : A_AC3
Duration : 58mn 52s
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Stream size : 162 MiB (11%)
Title : English
Language : English