It seems to be a Photomatix problem but don't be surprised if Adobe comes around and fixes it...remember, LR 4.4 is an RC, not the final GM version. It's quit possible that changes made to LR 4.4 exposed a flaw in a 3rd party software. It's happened before. Who is at fault and who should "fix it"? Tough question...but if LT 4.4 is technically doing the "right thing" maybe its up to the 3rd party to fix it.
Thanks Jeff and confirmed maybe a strong word to use now. I have contacted HDRsoft about the issue and hope they have more insight into the problem.