[greglepore]

Dan Gryder's take on this is interesting. I don't buy all of it, he claims that the lack of frost indicates that it was not a pressurization incident. He also reported that the pilot communicated at 24000 leaving for 34000 so there was pressurization there. But other sources report that a slow leak would cause frost.
Gryder puts all of the blame on a lack of a copilot.
Interestingly enough, the owner has only owned this plane since April of this year.