"Warning MVs not available" error window appears when playing DVDs

Binary package hint: mplayer

Rather low prio as it doesn't prevent mplayer from playing movie.
So far observed only when playing DVD and so far it appeared on every DVD I tried.
standard output may be useful:

morgwai@darkstorm:~$ gmplayer
MPlayer UNKNOWN-4.4.1 (C) 2000-2009 MPlayer Team
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.

Playing dvd://1.
libdvdread: Using libdvdcss version 1.2.10 for DVD access
There are 2 titles on this DVD.
There are 1 angles in this DVD title.

libdvdread: Attempting to retrieve all CSS keys
libdvdread: This can take a _long_ time, please be patient

libdvdread: Get key for /VIDEO_TS/VIDEO_TS.VOB at 0x00000120
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_01_0.VOB at 0x0000057d
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_01_1.VOB at 0x0000171c
libdvdread: Elapsed time 0
libdvdread: Found 1 VTS's
libdvdread: Elapsed time 0
audio stream: 0 format: ac3 (5.1) language: en aid: 128.
audio stream: 1 format: ac3 (5.1) language: de aid: 129.
audio stream: 2 format: ac3 (5.1) language: es aid: 130.
audio stream: 3 format: ac3 (stereo) language: en aid: 131.
number of audio channels on disk: 4.
subtitle ( sid ): 0 language: en
subtitle ( sid ): 1 language: de
subtitle ( sid ): 2 language: es
subtitle ( sid ): 3 language: nl
subtitle ( sid ): 4 language: sv
subtitle ( sid ): 5 language: no
subtitle ( sid ): 6 language: da
subtitle ( sid ): 7 language: pt
subtitle ( sid ): 8 language: iw
subtitle ( sid ): 9 language: pl
subtitle ( sid ): 10 language: el
subtitle ( sid ): 11 language: cs
subtitle ( sid ): 12 language: tr
subtitle ( sid ): 13 language: hu
subtitle ( sid ): 14 language: is
subtitle ( sid ): 15 language: hr
subtitle ( sid ): 16 language: fr
subtitle ( sid ): 17 language: it
subtitle ( sid ): 18 language: en
subtitle ( sid ): 19 language: de
number of subtitles on disk: 20
MPEG-PS file format detected.
VIDEO: MPEG2 720x576 (aspect 3) 25.000 fps 7000.0 kbps (875.0 kbyte/s)
[VO_XV] Could not grab port 91.
==========================================================================
Opening video decoder: [mpegpes] MPEG 1/2 Video passthrough
VDec: vo config request - 720 x 576 (preferred colorspace: Mpeg PES)
Could not find matching colorspace - retrying with -vf scale...
Opening video filter: [scale]
The selected video_out device is incompatible with this codec.
Try appending the scale filter to your filter list,
e.g. -vf spp,scale instead of -vf spp.
VDecoder init failed :(
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Unsupported PixelFormat -1
Selected video codec: [ffmpeg2] vfm: ffmpeg (FFmpeg MPEG-2)
==========================================================================
==========================================================================
Opening audio decoder: [liba52] AC3 decoding with liba52
Using SSE optimized IMDCT transform
Using MMX optimized resampler
AUDIO: 48000 Hz, 2 ch, s16le, 384.0 kbit/25.00% (ratio: 48000->192000)
Selected audio codec: [a52] afm: liba52 (AC3-liba52)
==========================================================================
[pulse] working around probably broken pause functionality,
        see http://www.pulseaudio.org/ticket/440
AO: [pulse] 48000Hz 2ch s16le (2 bytes per sample)
Starting playback...
VDec: vo config request - 720 x 576 (preferred colorspace: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 1.78:1 - prescaling to correct movie aspect.
VO: [xv] 720x576 => 1024x576 Planar YV12
[mpeg2video @ 0x7f97b6491a80]ac-tex damaged at 20 4
[mpeg2video @ 0x7f97b6491a80]Warning MVs not available
[mpeg2video @ 0x7f97b6491a80]concealing 1440 DC, 1440 AC, 1440 MV errors
morgwai@darkstorm:~$ : 0.014 ct: 0.078 2724/2724 11% 5% 1.5% 0 0

ProblemType: Bug
Architecture: amd64
Date: Sat Oct 31 22:54:27 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/gmplayer
Package: mplayer 2:1.0~rc3+svn20090426-1ubuntu10
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=en_US.UTF-8
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
RelatedPackageVersions:
 libavcodec52 4:0.5+svn20090706-2ubuntu2
 libavcodec-extra-52 N/A
SourcePackage: mplayer
Uname: Linux 2.6.31-14-generic x86_64
UserConf: # Write your default config options here!
system: distro = Ubuntu, architecture = x86_64, kernel = 2.6.31-14-generic