SoD is sleep of death , and you need to reboot device to wake up.
I never thought people was speaking of SoD referring to the browser issue that I never got so far....
my tablet go sleep, and won't wake up until I restart it.
I am running the ICS bootloader when start "white text top left" show ICS
I will read again the OP and see if anything I miss.
That is all I can do , 2 versions, I hope when final release comes Acer got a fix for this problem.