*** the network send to icecast is blocking (and there's no timeout
implemented), so everything hangs when the icecast server we're streaming
to is suddenly unreachable for some reasons

*** when an mp3 stream and a ogg stream are mixed together the ogg stream
crackles a bit. that's due to the chunksize, being 4096bytes long in ogg
and 4608bytes long in mp3. the problem will be fixed on next releases.

*** if loading a mpeg network stream on the same channel where an oggvorbis
has been played right before bad things happen.
