Just how did Universal become HD DVD exclusive?

[DavePS3]

I was under the impression - for whatever reason, that because Sony and Universal were competing studios, there was a rift between magagements with Sony grabbing a few execs from Universal but at the least, there was supposedly bad blood between the two. Political crap between a couple of decision makers and that was all it took. I worked in Hollywood for a few years and I've seen egos make some pretty dumb decisions just out of spite. It's a small town.