wrong subtitle display in mkv-container with mplayer -subcp $encoding

[Krutov Mikle]

Steps to reproduce:
1) get any video file, any russian cp1251 (may be all the other non-utf encodings are buggy) encoded srt-subtitles (didn't check ass).
2) try to mkvmerge it (mkvmerge file.avi file.srt -o file.mkv)
3) then use MPlayer to play it.

Expected: MPlayer plays the file right, displaying subs readable way.
Happens: MPlayer doesn't read any options from -subcp (tried the encoding that enca talled me about the external sub file (cp1251) & enca:ru:utf-8) and displays subtitles wrong way. ( first attach , second one is from the very same file and external sub.)

lsb_release -rd:
Description: Ubuntu 8.04.2
Release: 8.04

LC_ALL=C apt-cache policy mplayer-nogui
mplayer-nogui:
  Installed: 2:1.0~rc2-0ubuntu13.1
  Candidate: 2:1.0~rc2-0ubuntu13.1
  Version table:
 *** 2:1.0~rc2-0ubuntu13.1 0
        500 http://mirror.yandex.ru hardy-updates/multiverse Packages
        500 http://security.ubuntu.com hardy-security/multiverse Packages
        100 /var/lib/dpkg/status
     2:1.0~rc2-0ubuntu13 0
        500 http://mirror.yandex.ru hardy/multiverse Packages

also the first comment is wrong, the original sub encoding in the second mkv was utf, so it played normally.

[Krutov Mikle (nekoexmachina)]

Also, mplayer plays normally _some_ files, some are buggy. Do not know what's the difference for mplayer between the files, may be the codecs:

VIDEO: [XVID] 640x480 24bpp 23.976 fps 0.0 kbps ( 0.0 kbyte/s)
Selected video codec: [ffodivx] vfm: ffmpeg (FFmpeg MPEG-4)
AUDIO: 48000 Hz, 2 ch, s16le, 192.0 kbit/12.50% (ratio: 24000->192000)
Selected audio codec: [a52] afm: liba52 (AC3-liba52)
for the wrong played file, and

VIDEO: [DX50] 640x480 24bpp 23.976 fps 0.0 kbps ( 0.0 kbyte/s)
Selected video codec: [ffodivx] vfm: ffmpeg (FFmpeg MPEG-4)
AUDIO: 48000 Hz, 2 ch, s16le, 224.0 kbit/14.58% (ratio: 28000->192000)
Selected audio codec: [a52] afm: liba52 (AC3-liba52)

for the good one.