When converting this sample file to .mkv from .m2t, ffmpeg incorrectly detects a third (empty) stream, reporting it as ac3, 0 channels, s16.

ffmpeg output:

FFmpeg version SVN-r20217, Copyright (c) 2000-2009 Fabrice Bellard, et al.
  built on Oct 13 2009 08:30:54 with gcc 4.4.1 [gcc-4_4-branch revision 150839]
  configuration: --enable-gpl --enable-nonfree --enable-libmp3lame --enable-libx264 --enable-libfaac --enable-libfaad --enable-pthreads --prefix=/usr --enable-postproc --enable-avfilter --enable-avfilter-lavf --enable-libxvid --enable-libschroedinger --enable-shared --enable-libvorbis --enable-libtheora
  libavutil     50. 3. 0 / 50. 3. 0
  libavcodec    52.37. 0 / 52.37. 0
  libavformat   52.39. 0 / 52.39. 0
  libavdevice   52. 2. 0 / 52. 2. 0
  libavfilter    0. 5. 1 /  0. 5. 1
  libswscale     0. 7. 1 /  0. 7. 1
  libpostproc   51. 2. 0 / 51. 2. 0
[mp2 @ 0x809d100]Header missing
[mpegts @ 0x806c380]max_analyze_duration reached

Seems stream 2 codec frame rate differs from container frame rate: 50.00 (50/1) -> 25.00 (25/1)
Input #0, mpegts, from 'incorrect_mpegts_streams.m2t':
  Duration: 00:00:12.68, start: 12293.330878, bitrate: 6456 kb/s
    Stream #0.0[0x240]: Audio: ac3, 0 channels, s16
    Stream #0.1[0x28a]: Audio: mp2, 48000 Hz, 2 channels, s16, 256 kb/s
    Stream #0.2[0x200]: Video: mpeg2video, yuv420p, 720x576 [PAR 64:45 DAR 16:9], 9000 kb/s, 25 tbr, 90k tbn, 50 tbc
At least one output file must be specified

Mediainfo and mplayer do not detect the empty stream.