...
Edit: Oops - AMU10 went zombie, 22 hours in.
But did it hotplug back in?
In my ~1 day test run on windows with lulz, one of my 3 AMU did go zombie a few times but it always hotplugged back in shortly after.
My memory says it did not - I'm pretty sure, but then I'm not 100% sure of anything (too many philosophy courses).
My next lulz run had one anomaly after 20 hours - an AMU LED was on but the device did not show as a zombie. The display originally showed AMUs 0-12, as expected. Some time during the run AMUs 1 and 11 dropped from the display. One of them was apparently reallocated to 13 and the other was just missing. Presumably it was the one with the LED on - a nameless zombie.
It was cool to the touch. Unplugging it did not change the display. Replugging it produced the usual five blinks, but then the LED stayed on and cgminer did not recognize it.
A "Q" and restart fixed the issue.
I'll switch to 3.8.2 shortly.