I tried the transcoding script from the command line before, it streams the right things to the console 😉
I had even added the path to oggdec, but flac and wavstreamer were in /usr/bin and /usr/local/bin, never thought that would be a problem.
Adding them explicitely really helped – ogg and flac playback are now perfect even in daemon mode, many thanks 🙂
Leaves Musepack, but for that I’ll continue on my own 🙂