I can back Drew up on this. We had a lab full of these (too bad they were scrapped before I could get my hands on 'em!). They were completely stable compu-beasts. I can't say that no one anywhere on the planet had the problems you were discussing, but I can say that I never encountered anything remotely similar to those things. And I can also say that the claim about the cache only being half-used does not have the ring of truth (given how cache hits and misses are handled) leading me to regard the rest of that list with a skeptical eye.