I have read in length Henke's paper about a year ago, and through all the smoke of the mudslinging he does, only a handful of issues are of any importance to the data and it's implications.
Well, you are way behind the curve. Henke's posting has been updated (and I still don't like it much; I agree that it's over the top). Dr. Loechelt and others have posted severl items criticizing Humphreys: see
Helium Diffusion in Zircons. The latest is a letter from Dr. Loechelt published in Journal of Creation, and a response by Humphreys in which he finally admits that he read the temperature graphs in his references backwards. He's incredibly incompetent It's too bad the JoC isn't availabgle online; it's very amusing to see how much space they gave Humphreys after forcing Dr. Loechelt to shorten his letter so. (The JoC article is available to members in the dropbox on TalkRational.org.)