My Z8 is connected to my soundsystem (Yamaha RX-V485) via HDMI - CEC, so that the soundsystem automatically switches on when the Z8 box witches on (from standby) and the sound is transferred to the soundsystem. Before the update (to Beta and now) this official release, the sound was always transferred to the soundsystem at switch-on of the Z8, no issues ever.
Install "Audio Optimizer" from Market, execute once and reboot the box. Try again.
I only get this work (Wake up TV with Formuler/Wake up Formuler with TV) if I put the box in standby mode.
Update Changelog: IMP: CEC: Wake up TV with Formuler. Wake up Formuler with TV (Must use Standby power mode)