Hello,
I have a problem play my mkv files connecting the HD to usb.
Have tried two mkv with profile level High@L4.0, no problem.
But mkv with profile level High@L4.1 doesn't work.
I double check that sound isnt DTS.

Thanks for help, Leon.

Firmware: 000.096.000.000

MediaInfo of mkv that doesn't play:

General
Unique ID : 173594889079506727261200330528042899953 (0x829928D574BD44E9B785079ABCFDD9F1)
Complete name : G:\Movie\D.mkv
Format : Matroska
Format version : Version 2
File size : 6.87 GiB
Duration : 2h 45mn
Overall bit rate : 5 950 Kbps
Encoded date : UTC 2013-04-01 07:54:19
Writing application : mkvmerge v2.9.8 ('C'est le bon') built on Aug 13 2009 12:49:06
Writing library : libebml v0.7.7 + libmatroska v0.8.1

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 12 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 2h 45mn
Bit rate : 5 500 Kbps
Width : 1 280 pixels
Height : 534 pixels
Display aspect ratio : 2.40:1
Frame rate mode : Constant
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.336
Stream size : 6.22 GiB (90%)
Writing library : x264 core 130 r2273 b3065e6
Encoding settings : cabac=1 / ref=12 / deblock=1:-3:-3 / analyse=0x3:0x113 / me=umh / subme=10 / psy=1 / psy_rd=1.10:0.00 / mixed_ref=1 / me_range=32 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-2 / threads=18 / lookahead_threads=3 / sliced_threads=0 / nr=0 / decimate=0 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=8 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=240 / keyint_min=24 / scenecut=40 / intra_refresh=0 / rc=2pass / mbtree=0 / bitrate=5500 / ratetol=1.0 / qcomp=0.75 / qpmin=0 / qpmax=69 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.20 / pb_ratio=1.15 / aq=1:0.80
Language : English
Default : Yes
Forced : No

Audio
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : A_AC3
Duration : 2h 45mn
Bit rate mode : Constant
Bit rate : 448 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 530 MiB (8%)
Language : Russian
Default : No
Forced : No