Markus, could you please: 1. post your /etc/default/pulseaudio 2. post your /etc/default/speech-dispatcher 3. post output of: grep AudioOutputMethod /etc/speech-dispatcher/speechd.conf
Also, could you answer the same question I sent to Jan, i.e.: Do you remember the problem happening with previous 0.7* versions of speech-dispatcher, or is it specific to exactly 0.7.1-6 (and not 0.7.1-5 or 0.7-6.1 etc.)?