I am currently testing 80 units (SF100D-05) and so far (after 20 units tested) 10 are not working properly.
It's always 1,2 or 3 different ports that do not seem to connect properly (not status led on). On a single unit its always the same ports, but not the same ports from unit to unit, and never more than 3 unresponsive ports.
Cisco needs to tell us what is going on. And if they know anything about this.
We are currently building a system where we prototyped using a fully functionnal unit. Now that we have to scale things up, it's impossible to rely on all the units we got.