Well, my first post about this problem was ignored so I've decided to repost it + add some more problems to it.
First of all after clean install of FC3 test 1 I've updated the system via yum, at this time the sound in gnome was working just fine.
dropped down from kernel -517 to -515, mkinitrd doesn't work ..comes up with command not found"
installed newest Nvidia drivers and rebooted to KDE ... no sound!
re-logging as root or as user in Gnome or KDE makes no difference still no sound. I can make the speakers make a sound when I'm muting sound via Kmix, all I hear is the crackling "on-off" sound
apart form this in KDE the conqueror window keeps crashing every 2-5 sec after opening.
Another thing, where in new KDE can I stop my monitor form switching off? all there is in power management is laptop power ..I'm not on laptop I want my monitor and my HD's to work!..and I do now want to hard reset my FC box when I come back after more than an hour.