Aluminium Wireless Keyboard Wakes iMac After Firmware Update

Hi All,
Not sure if anyone is experiencing the same problem, but when I put my iMac to sleep now, it wakes up randomly saying that it has lost connection with my keyboard. I have had zero issues since buying by computer, and I really dont want to have to uncheck the 'allow bluetooth devices to wake computer' option.
Is there any way to downgrade the keyboard firmware?
Apple support please help!
Thanks,
Rob

I also have this problem. Since I have a wireless mouse I just turn off the keyboard when I'm done using it, and use the mouse to wake the computer. Since I've started doing this I've checked the Console for abnormal wake events in the mornings, and none have occurred (in the past couple weeks). I would have at least one a night when I left the keyboard on. I didn't notice it before the last firmware update (don't know the number right off), but it could have been occurring before.
Also, many times when I put my computer to sleep with the keyboard or the mouse, it will immediately wake back up. I've also noticed that when the keyboard is off this doesn't happen.

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Aluminium Wireless Keyboard Wakes iMac After Firmware Update

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