I am running Leopard (10.5.8 ) on a Core 2 Duo Machine (Details is in the footer). For audio, AppleHDA.kext is used for VMWare compatibility.
After update to Chameleon 2.0 RC4, I get uncomfortable loud pulse noise before starting sound after a period of silence.
This didn't happen with RC3 and before (actually, I downgraded to RC3 and it works fine).
I hope the audio issue fixed (or reverted) in the next RC (or official release).
Best regard,
Ichiro

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Ichiro
GA-EP45-DQ6 V1 F12, E8500 @ 3.16 GHz, 550W PS, 4x 2GB DDR2-800, 320GB Sata Hitachi x2, Galaxy 9800 GT, Lite-On Sata DVD, OSX 10.5 Retail -> UG10.5.8, AHCI mode