no sound in sound&video aps., flash still sounds after todays 8.04 update

[Vitorio Okio]

As subject says, after today's update of my Ubuntu 8.04 all of my sound & 
video apps (VLS, Totem, Rythmbox, etc.) lost sound completely. 

I still can watch videos and listen to music on Youtube in my Firefox. 
Thus Flash is fine.

I do not remember what exactly was updated but it seems to me there were 
some sound & video related libraries.

Alsamixer GUI applet shows correct hardware and all channels are enabled. 
PulseAudio applet shows the hardware and software (alsa is in use) 
correctly as well.

Boy, it's frustrating. This is LTS release. Why an update should brake it 
so badly?

Any suggestions, please?  Your help is appreciated.