In keeping up with current events, we had the same problem today.
We caught the problem early on, but the Jaguar had already failed at that point. We could smell "warm plastic," and when we disassembled the Jaguar in question, the smell was confirmed: the plastic around one of the FETs had begun to melt.
There were no metal chips to be found, and I have no reason to believe any would have ended up in there. In our testbed, this Jaguar was mounted sideways on a panel above all driven components, and had been opened up fresh out of the box the night before. This was in regular use (
http://www.youtube.com/watch?v=FkuxZKA6Cl0).
Hopefully we'll be able to find the source of the problem since this Jaguar is nowhere close to incinerated. I'll be in discussion with Luminary.