I have a similar situation as Nikos has, with no sound for Flash (YouTube videos) and Rhythmbox working properly instead. When running Firefox from the terminal, I get
ALSA lib pulse.c:272:(pulse_connect) PulseAudio: Unable to connect: Connessione rifiutata (i.e., "Connection refused")
Doesn't seem deterministic, in the sense that it starts working, but at some time it stops.
I have a similar situation as Nikos has, with no sound for Flash (YouTube videos) and Rhythmbox working properly instead. When running Firefox from the terminal, I get
ALSA lib pulse.c: 272:(pulse_ connect) PulseAudio: Unable to connect: Connessione rifiutata (i.e., "Connection refused")
Doesn't seem deterministic, in the sense that it starts working, but at some time it stops.