Icecast - Dec 2008 - problems streaming theora with oggfwd and icecast2

Hi guys ,

I used ffmpeg , and ffmpeg2theora , with oggfwd for streaming to the
icecast2 streaming server without any problems.

But now , only works if I use ffmpeg2theora.

I try with one of the latest svn version and  one that I consider "
stable" because  is ok for all my needs , and they don't work.
This is the complete shell output

ffmpeg -i /home/pierpaolo/Scrivania/31.mpg -vcodec libtheora -acodec
libvorbis -ab 128k -b 1000k -f ogg - | oggfwd localhost 8000 123456
/ffmpeg.ogg
FFmpeg version SVN-rUNKNOWN, Copyright (c) 2000-2008 Fabrice Bellard, et
al.
 configuration: --prefix=/usr --enable-shared --enable-libmp3lame
--enable-gpl --enable-libfaad --enable-libvorbis --enable-pthreads
--enable-libfaac --enable-libxvid --enable-libgsm --enable-libx264
--enable-liba52 --enable-libtheora --enable-vhook --enable-mmx
--enable-libogg --enable-x11grab --enable-pp
 libavutil version: 49.5.0
 libavcodec version: 51.45.0
 libavformat version: 51.14.0
 built on Nov  8 2008 16:53:09, gcc: 4.2.4 (Ubuntu 4.2.4-1ubuntu3)
Input #0, mpeg, from '/home/pierpaolo/Scrivania/31.mpg':
 Duration: 00:09:03.0, start: 0.500000, bitrate: 1751 kb/s
 Stream #0.0[0x1e0]: Video: mpeg2video, yuv420p, 720x576, 9000 kb/s,
25.00 fps(r)
 Stream #0.1[0x1c0]: Audio: mp2, 48000 Hz, stereo, 192 kb/s
Output #0, ogg, to 'pipe:':
 Stream #0.0: Video: libtheora, yuv420p, 720x576, q=2-31, 1000 kb/s,
25.00 fps(c)
 Stream #0.1: Audio: libvorbis, 48000 Hz, stereo, 128 kb/s
Stream mapping:
 Stream #0.0 -> #0.0
 Stream #0.1 -> #0.1
Press [q] to stop encoding
oggfwd: Connected to server
warning: This doesn't look like a Speex file

I installed libtheora and libvorbis , normal and develop version , via
apt-get on my ubuntu linux 8.0.4
How I can  fix this problems?

Best Regards

Pierpaolo