4.2 - no sound

Hi, I'm having a problem with sound since the updates that appeared at the end of last week in kde-testing. I upgraded my Fedora 10 to 4.2 early last week and found that it was very stable - everything worked (including sound). Since an update on the 30th which included phonon-4.3.0-4.fc10.x86_64, phonon- backend-xine-4.3.0-4.fc10.x86_64 and phonon-devel-4.3.0-4.fc10.x86_64 - I've got no sound at all from my system. Pulseaudio is running. I've checked perms under /dev. I've got the following when running pulseaudio -vvv and executing 'paplay something.wav' : I: protocol-native.c: Connection died. I: module-suspend-on-idle.c: Source alsa_output.pci_8086_293e_sound_card_0_alsa_playback_0.monitor idle for too long, suspending ... I: module-suspend-on-idle.c: Sink alsa_output.pci_8086_293e_sound_card_0_alsa_playback_0 idle for too long, suspending ... I: module-alsa-sink.c: Device suspended... I: module-suspend-on-idle.c: Source alsa_input.pci_8086_293e_sound_card_0_alsa_capture_0 idle for too long, suspending ... I: module-alsa-source.c: Device suspended... but I'm not certain if they are errors or not. I've tried testing the output devices under Multimedia System Settings - no errors reported, but still no sound. I've gone through the troubleshooting steps at http://fedoraproject.org/wiki/SoundTroubleshooting but am none the wiser. Anyone else experiencing a problem? Any suggestions as to what to check next? Thanks! Paul.