Clips with playback problem

[oneplusme]

With firmware 01-17-081023-15-POP-403, I've found the following video gives horrible macro-blocking problems between keyframes (as though it's not handling the intermediate frames quite right yet):

Code:

General
Complete name                    : file.mkv
Format                           : Matroska
File size                        : 233 MiB
Duration                         : 20mn 27s
Overall bit rate                 : 1 590 Kbps
Encoded date                     : UTC 2008-12-20 11:06:21
Writing application              : mkvmerge v2.2.0 ('Turn It On Again') built on Mar  4 2008 12:58:26
Writing library                  : libebml v0.7.7 + libmatroska v0.8.1
Cover                            : Yes / Yes / Yes / Yes

Video
Format                           : AVC
Format/Info                      : Advanced Video Codec
Format profile                   : High@L5.1
Format settings, CABAC           : Yes
Format settings, ReFrames        : 16 frames
Muxing mode                      : Container profile=Unknown@5.1
Codec ID                         : V_MPEG4/ISO/AVC
Duration                         : 20mn 26s
Nominal bit rate                 : 1 464 Kbps
Width                            : 1 280 pixels
Height                           : 720 pixels
Display aspect ratio             : 16/9
Frame rate                       : 23.976 fps
Resolution                       : 24 bits
Colorimetry                      : 4:2:0
Scan type                        : Progressive
Bits/(Pixel*Frame)               : 0.066
Writing library                  : x264 core 65
Encoding settings                : cabac=1 / ref=16 / deblock=1:0:0 / analyse=0x3:0x133 / me=umh / subme=9 / psy_rd=1.0:0.4 / mixed_ref=1 / me_range=24 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / chroma_qp_offset=-4 / threads=6 / nr=0 / decimate=0 / mbaff=0 / bframes=8 / b_pyramid=1 / b_adapt=2 / b_bias=0 / direct=3 / wpredb=1 / keyint=300 / keyint_min=20 / scenecut=40(pre) / rc=2pass / bitrate=1464 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / pb_ratio=1.30 / aq=1:1.00

Audio
Format                           : AAC
Format/Info                      : Advanced Audio Codec
Format version                   : Version 4
Format profile                   : LC
Format settings, SBR             : No
Codec ID                         : A_AAC
Duration                         : 20mn 27s
Channel(s)                       : 2 channels
Channel positions                : L R
Sampling rate                    : 48.0 KHz
Resolution                       : 16 bits
Title                            : 2.0 AAC

Text
Format                           : ASS
Codec ID                         : S_TEXT/ASS
Codec ID/Info                    : Advanced Sub Station Alpha
Title                            : Styled Subtitle
Language                         : English