Another E4612RS2V13B1.0 i guess we have a batch with a problem here
Err, the "bad batch" was supposed to be the one with the label E3912RS2V13B1.0, of which the 3912 probably means week 39, 2012 (no official conformation, but its the only part of the label that resembles a manufacturing date) and this one (E4612) is made 7 weeks later!
I asked around, and found at least one PI owner with an RS PI with the "E3912RS2V13B1.0" sticker that has no problem whatsoever, which isn't strange considering many tens of thousands are made every week, and the batch (if it exists at all) will be much smaller, or we would be flooded by posts in this topic.
Its far more likely that every now and then something happens with a panel of six PI's, and (some) PI's from that panel are still sent off. What happens one could only speculate, it could be that the soldering oven wasn't heated up enough (the "monday morning syndrome"), or a panel fell from the assembly line on the ground while still hot. In any case the number of PI's affected in that incident would be very small.
In any normal production system the failure rate would be about 1% anyway, but post production testing should bring that number down to almost zero.